Site logged me out and can't log back in (mobile device)

[YumYum74]

I was browsing the forum on my phone when the site suddenly logged me out after I clicked a forum link. I am unable to log back in, keep getting the message that the login information is incorrect. That is strange, because I use the exact same information on my desktop (from which I am writing this) and there are no issues there (yet). Also tried to reset my password, but when I click the link in the generated email that AV sends me, it only says something like 'activation code already used' so I can't fix it that way either.

What is going on?

[Kapwn]

Are you using the https://pornbox.com/reset-password to reset the password?

Could you please use an anonymous tab to reset your password?

Even opening the email you receive in anonymous tab.