Description: Synchronization with MyAnimeList stopped working. I'm not sure exactly when or why - I just visited my MAL and found out that it was not being updated.

I tried to resync the lists through Kitsu's interface, but it's complaining my Username/Password are wrong. However, this is very unlikely, as I use a password manager and copying the same Username/Password on MAL works flawlessly.

Steps to reproduce: Go to Kitsu --> Settings --> Export --> Setup Export to MyAnimeList --> attempt to login. Here, it shows me an authentication error despite the details being correct.

Screenshots (if applicable):
https://my.mixtape.moe/ldiwsy.png
OS and Browser:
W7/Firefox 65