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Jan 10, 2019 1:22 AM
#1

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Jul 2011
3925
Your request produced an error: 400 Bad Request
Please click back or continue to MyAnimeList.net.


So, server is going bad again? :(
KinetaAug 20, 2020 4:31 PM

"A half moon, it has a dark half and a bright half, just like me…", Yuno Gasai
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Jan 10, 2019 1:26 AM
#2

Offline
Aug 2014
70726
Nope. Are you using LastPass? I use that and it causes that 400 Bad Request for some reason. Disable it, then do whatever you wanted to do and enable it again.
Jan 10, 2019 1:27 AM
#3

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Jul 2011
3925
Ardanaz said:
Nope. Are you using LastPass? I use that and it causes that 400 Bad Request for some reason. Disable it, then do whatever you wanted to do and enable it again.

Not using LastPass.

"A half moon, it has a dark half and a bright half, just like me…", Yuno Gasai
Jan 10, 2019 1:28 AM
#4

Offline
Aug 2014
70726
Gaichi said:
Ardanaz said:
Nope. Are you using LastPass? I use that and it causes that 400 Bad Request for some reason. Disable it, then do whatever you wanted to do and enable it again.

Not using LastPass.

Probably some other browser extension then. Try disabling them temporarily.
Jan 10, 2019 4:43 AM
#5

Offline
Jul 2011
3925
I use only uBO (uBlock Origin), and I won't even try go internet without it, so yeah if it's at fault then so be it.

"A half moon, it has a dark half and a bright half, just like me…", Yuno Gasai
Jan 10, 2019 6:42 AM
#6

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Jul 2013
36274
I remember that in the past there were people experiencing 400 errors when trying to login caused by some extension (uMatrix or NoScript for example) blocking requests to scripts loaded from myanimelist.cdn-dena.com.

That was quite some time ago though so I don't know how relevant that is now.
For those who seek perfection, there can be no rest on this side of the grave.
Hope is the first step on the road to disappointment.
Jan 10, 2019 7:14 AM
#7

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Oct 2014
14720
Gaichi said:
I use only uBO (uBlock Origin), and I won't even try go internet without it, so yeah if it's at fault then so be it.
I use ublock origin as well. However, I'm not getting these errors. Do these occur when you're trying to access certain pages?
I don't know why people write that they are approachable persons,
if you were you wouldn't be on MAL.
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Extended families or lovers on MAL are a farce.
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Jan 10, 2019 2:22 PM
#8

Offline
Jul 2011
3925
Happened 2 times during login, 3 times when tried edit profile.

And yes only on MyAnimeList page, so far.

"A half moon, it has a dark half and a bright half, just like me…", Yuno Gasai
Aug 5, 2020 10:55 AM
#9
Offline
Aug 2010
59
I am getting the 400 error on my new PC.
Aug 5, 2020 4:24 PM
Offline
Sep 2016
1
On login when LastPass is enabled, the csrf_token is not sent....
And when uBlockOrigin is enabled you get the Error 400 but get connected.
I don't know the root cause for uBlockOrigin but I guess it has to do with the g-recaptcha-response has it's the only field in the POST request that differs between with and without.
But yeah for the crsf_token please fix that at least, disabling uBlockOrigin on a site is not a big deal as you can do it per site, disabling LastPass however requires to completely disable the extension from parameters...
Aug 5, 2020 6:04 PM
Offline
Jun 2009
1
Hi, also wanted to bump up this post. I don't want to have to turn off Lastpass every time I need to log in, especially when I use Lastpass to log in. Hope this gets fixed soon!
Aug 5, 2020 9:46 PM
Offline
Aug 2010
2
commanduh said:
Hi, also wanted to bump up this post. I don't want to have to turn off Lastpass every time I need to log in, especially when I use Lastpass to log in. Hope this gets fixed soon!


same boat, guess I'll just incognito until it stops
Aug 6, 2020 8:39 AM

Offline
Oct 2014
6693
I tried DuckDuckGo for a few days and now I'm in 400 Hell. Is MAL that finicky? The double-post thing was annoying (fixed now) but this issue has effectively prevented me from posting at least half the time.

If this post goes through it'll be after multiple attempts and using MS Edge (for the first time). May be the last MAL post for me until I read that this is fixed.
Avatar: Anzu Kadotani from Girls und Panzer. XMas awesomeness version by Charenji :)

Aug 6, 2020 9:24 AM

Offline
Nov 2011
4022
Having the same issues, i'm using adblock plus, its disabled for MAL, enabling it temporarily fixed it, but after a while it came back, then disabling it fixed it again for a while, it seems i have to keep switching between the two, no idea why it happens

Join the MSP Club for an in-depth look at score progressions and other stats of currently airing anime
Aug 7, 2020 12:55 AM
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Apr 2018
3
This is stupid i won't be using mal until it's fixed
Aug 7, 2020 6:02 AM

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May 2014
109
i use webroot and disabling the webroot password manager extension let me login. i enabled it after login but started getting errors again so i'm leaving it off for now
Aug 7, 2020 3:41 PM

Offline
Nov 2008
1023
Was able to reproduce getting error 400, that people above described, by attempting to log in with Google scripts blocked, so i assume reCAPTCHA is to blame.
AnimeThemes.moe <- the largest collection of anime Openings & Endings on the Web
AnimeMusicQuiz.com <- guess an anime from your list by it's Opening/Ending music browser game
Aug 7, 2020 5:37 PM
Offline
Apr 2011
1
Just chiming in, so far I've been getting this error on chrome with lastpass and ublock origin. This is unusual as I've been running these and other extensions for years without it affecting my experience here.

something must have changed on MAL's end, or perhaps something further down the line as genoard suggests.

switching to ff, with similar extensions, works. though its a temporary fix.
Aug 7, 2020 7:40 PM

Offline
Sep 2009
1779
Have the error here as well, but i'm getting mine when trying to login through the usual means of User\Pass, but after I opted to log in via my gmail it worked.
Aug 8, 2020 2:09 AM
Offline
Oct 2007
15
I have this issue as well. Using the latest Firefox 79.
I am not really blocking anything. I'm having lastpass added to my browser as well. Had to use my phone to log in.
Aug 8, 2020 6:30 AM
★★★★★

Offline
Sep 2008
19291
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.
Aug 8, 2020 7:18 PM
Offline
Feb 2015
1
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


I can confirm, I am using Last Pass with Chrome and I cannot login. I am currently using Firefox that doesn't have any extensions installed just to post this. I also tried logging in with OAuth using my Google account to see if I could get past it, but I got the same 400 error. Seems you guys have this problem since August 5th... I would think you would give high priority to fixing a logging in issue, but whatever.
Aug 8, 2020 8:27 PM

Offline
Sep 2014
268
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


1. I don't use LastPass or any other password manager
However I do block javascript. It seems I need to enable lots of JS from google to post anything or login to mal now which is a shame because I really don't wanna have Google JS running all the time

2. Seems to be anything with a submit button except my actual list

Genoard said:
Was able to reproduce getting error 400, that people above described, by attempting to log in with Google scripts blocked, so i assume reCAPTCHA is to blame.


Yep it's google's scripts that seem to be breaking everything. I was fully able to use the site without google scripts running before so I'm assuming this is a recent change.

I'd really really like it if they fixed this so I don't have to run google scripts to use mal, I'm having to enable them to post this forum post now
Aug 9, 2020 4:11 AM
Offline
Aug 2013
1
I was using LastPass and uBlock Origin on Chrome. All attempts to hit the Login button after entering username and password resulted in a 400. Disabling uBlock did nothing. Disabling LastPass allowed me to login.
Aug 9, 2020 4:30 AM

Offline
Jul 2017
15
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


1. Yes. And disabling it let me log in, however after the successful login it displayed the 400 error instead of the "successful login" dialogue.

2. Only seen it on myanimelist.net/login.php so far
Aug 9, 2020 5:22 AM

Offline
Aug 2020
6
rsc-pl said:
Sorry for digging old post, but this is ridiculous.
Please do something with your security measurements, because telling people that they need to disable literally KEY extension like lastpass is just stupid.
Starting from today, I can't do anything with lastpass enabled. I can't post, can't send PM, can't even login - everything is generating 400 error.

That's strange, as I was experiencing the error until I disabled LastPass just to register today and after registering, I re-enabled it and am able to do everything else just fine (EDIT: Nope, not everything--I can't login without having LastPass disabled, which is beyond frustrating).

That being said, I agree--the security is trash on this site, and needs to be re-worked.
oooo0oo000Aug 9, 2020 5:30 AM
Aug 9, 2020 6:21 AM
Offline
Jul 2015
2
oooo0oo000 said:
rsc-pl said:
Sorry for digging old post, but this is ridiculous.
Please do something with your security measurements, because telling people that they need to disable literally KEY extension like lastpass is just stupid.
Starting from today, I can't do anything with lastpass enabled. I can't post, can't send PM, can't even login - everything is generating 400 error.

That's strange, as I was experiencing the error until I disabled LastPass just to register today and after registering, I re-enabled it and am able to do everything else just fine (EDIT: Nope, not everything--I can't login without having LastPass disabled, which is beyond frustrating).

That being said, I agree--the security is trash on this site, and needs to be re-worked.


The same problem since today. Why should I disable LastPass to use the site? My password is too complicated to remember. Now I have to copy and paste it (that is not secured).
Aug 9, 2020 7:06 AM
Offline
Aug 2019
1
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


1. Yes, and I can enable it after successful login, and use website without more problems.

2. Only seen it on myanimelist.net/login.php so far

Edit:
Also encountered an error while trying to change username with LastPass enabled (No error when last pass is disabled) https://myanimelist.net/editprofile.php
nottooAug 9, 2020 7:11 AM
Aug 9, 2020 7:24 AM

Offline
Nov 2008
1023
oooo0oo000 said:
That being said, I agree--the security is trash on this site, and needs to be re-worked.

Ironic, considering the reason for these errors is a new security feature, lol.
AnimeThemes.moe <- the largest collection of anime Openings & Endings on the Web
AnimeMusicQuiz.com <- guess an anime from your list by it's Opening/Ending music browser game
Aug 9, 2020 7:56 AM

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Jun 2020
3
So glad I found this post. The issue has been ongoing for a few days but disabling LastPass allowed me to login, albeit in a less convenient way.
Aug 9, 2020 8:23 AM

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Aug 2020
6
Genoard said:
oooo0oo000 said:
That being said, I agree--the security is trash on this site, and needs to be re-worked.

Ironic, considering the reason for these errors is a new security feature, lol.

What security feature, specifically?
Aug 9, 2020 8:40 AM

Offline
Nov 2008
1023
oooo0oo000 said:
Genoard said:

Ironic, considering the reason for these errors is a new security feature, lol.

What security feature, specifically?

Google's reCAPTCHA. I provided a brief explanation on how it works in this thread. Can't tell why using LastPass breaks it though, didn't use this extension myself. My non-educated guess would be that it allows you to log in from any page of a website by sending query direcrly, without loading the actual login page and reCAPTCHA scripts along with it.
AnimeThemes.moe <- the largest collection of anime Openings & Endings on the Web
AnimeMusicQuiz.com <- guess an anime from your list by it's Opening/Ending music browser game
Aug 9, 2020 8:47 AM

Offline
Oct 2014
6693
I don't use LastPass (never even heard of it before)

Browser is Chrome. As far as extensions go they are:

Adobe Acrobat (convert web page to an Adobe Acrobat file). Tbh I've only used this a couple times in as many years so I'll probably disable it
Go Back With Backspace -- been using this forever and would be a pain to go without
ImTranslator
Avast Online Security
Tampermonkey which is managing a very useful script I use called MyAnimeList(MAL) Voice Actor Filter v1.4.1

None of those are new: been using them for years.

The 400 error crops up when I post from Anime Recommendations. Pre-viewing the post usually triggers it also but not every time. Logging onto MAL is no problem (though lately I've been keeping the site open and at night just letting my computer go into standby rather than shutting down).
8oomerAug 11, 2020 5:05 PM
Avatar: Anzu Kadotani from Girls und Panzer. XMas awesomeness version by Charenji :)

Aug 9, 2020 9:10 AM

Offline
Aug 2020
6
Genoard said:
oooo0oo000 said:

What security feature, specifically?

Google's reCAPTCHA. I provided a brief explanation on how it works in this thread. Can't tell why using LastPass breaks it though, didn't use this extension myself. My non-educated guess would be that it allows you to log in from any page of a website by sending query direcrly, without loading the actual login page and reCAPTCHA scripts along with it.

Well there is an option to launch the login page with the credential fields automatically filled out but it won't allow you to just ignore the reCAPTCHA if it exists on the login page.

Based on what I have been reading, though, it's not specifically related to LastPass. I hope somebody looks into this, as, again, it is beyond frustrating to deal with just for a single site out of the dozens that I use.
Aug 9, 2020 11:03 AM
Offline
Jan 2015
1
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


1. Yes - tested with all other extensions/add-ons disabled on chrome/mozilla/edge
2. currently only when trying to log in (https://myanimelist.net/login.php?from=%2F)
Aug 9, 2020 2:31 PM
Offline
Jul 2018
561872
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


1. Yes.

2. It only happens when I try to log in.
Aug 9, 2020 6:15 PM
Offline
Apr 2015
2
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.

1. Yes, with Firefox
2. Only tried the login page, not willing to disable lastpass to test for you. I was able to log in from my iPhone (where I also use LastPass but that works differently)
Aug 9, 2020 10:16 PM
Offline
Oct 2016
1
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


Answer:
1. yes
2. currently only when trying to log in (https://myanimelist.net/login.php?from=%2F)
Aug 9, 2020 11:03 PM
Offline
Jul 2012
1
Disabling LastPass did cause my csrf token to be sent and allow login.

What I find strange is that this is the first time that this is happening, that lastpass is affecting it, and that the csrf token is in the meta tags instead of the form.

Also this seems to be happening on other pages that have a CSRF token, like when posting this reply.
Aug 10, 2020 5:22 AM
Offline
Feb 2011
1
Also happens on mobile, when trying to log in from the main page.

Using safari on iPhone, so no browser extensions as far as I know.
Aug 10, 2020 5:28 AM

Offline
Jan 2011
34
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.

Adding to this as I have started to suffer from this as well (on Firefox 79.0), where I am indeed using LastPass and only get the error after trying to log in (https://myanimelist.net/login.php?from=%2F)
Aug 10, 2020 1:56 PM
Offline
Mar 2019
9
To anyone having problem logging in with firefox, check if your firefox version is 79.0 or above, and if it is try disabling tracking protection. They changed the tracking protection system and now it blocks MAL login page from logging you in for some reason. Here is how to do it:
Aug 10, 2020 6:34 PM
Offline
Jul 2018
561872
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


1. Yes I am using lastpass and
2. I am experiencing this issue onlyon MAL

I experience the issue when logging in Instead I am redirected to a page stating 400 Bad Request
Aug 11, 2020 6:10 AM

Offline
Nov 2008
1023
shaked6540 said:
They changed the tracking protection system and now it blocks MAL login page from logging you in for some reason.

The reason is MAL's new security implementation includes tracking by Google, so in this case tracking protection works as intended.
AnimeThemes.moe <- the largest collection of anime Openings & Endings on the Web
AnimeMusicQuiz.com <- guess an anime from your list by it's Opening/Ending music browser game
Aug 11, 2020 10:53 AM
Offline
Jul 2018
561872
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
Yes.

2. Where on the website do you get the 400 Bad Request?
Login page and editing this post. The original quick post on the bottom of the page did work.
Aug 11, 2020 2:48 PM

Offline
May 2010
81
1. Are you using Last Pass?
Yes.

2. Where on the website do you get the 400 Bad Request?
Login page.

I deactivated Lastpass and still got the error, but somehow, i got logged in anyway ?
Aug 11, 2020 4:22 PM
Offline
Jan 2018
2
1. Are you using Last Pass?
Yes and I refuse to disable it because that is an absurd request. I'm logged in now via a different browser without any extensions except uBlock Origin.

2. Where on the website do you get the 400 Bad Request
Login page is the only place I've tried.
Aug 12, 2020 10:31 PM
Offline
Jun 2014
1
1. Are you using Last Pass?
Yes

2. Where on the website do you get the 400 Bad Request
Only the login page

When I disabled last pass, I was able to login but still got the 400 error.
Aug 13, 2020 7:23 AM
lagom
Offline
Jan 2009
107289
i got this error when posting or making this thread https://myanimelist.net/forum/?topicid=1858606
Aug 13, 2020 2:51 PM
Offline
Oct 2018
1
Luna said:
Can everyone who gets a 400 Bad Request error please answer these questions:

1. Are you using Last Pass?
If the answer is "no", what other browser extensions/add-ons are you using?

2. Where on the website do you get the 400 Bad Request?
Please list all pages where you have seen the error.


1. Yes.

2. Login screen. Only started a few days ago.

I am using Firefox with a bunch of tracking-blockers/ad-blockers installed. With LastPass disabled (but everything else unchanged) I can log in.
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