No.5234
Thought I was the only one having this issue, glad to know that I'm not.
No.5350
I came here specifically to look up a solution to this. I also made a new account, logged out and couldn't get back in. Password correct cause auto filled in and everything
No.5368
I found the solution. The site doesn't support Capital letters. Type your username not like FurryLover7656 but furrylover7656 and it should work.
Shoutout to support for not helping me at all and instead insulting me so I had to look into it myself. Even included a screenshot showing my username with capital letters and they didn't mention anything about it.