Yeah I can access my old account now. But it seems that that account's posts are moderated, i.e. posts don't show up after posting (probably pending approval).
p/s: Alex, if you're reading this, note that the "Flag" function has been broken for months.
(Solved) [Forum] Effectively banned from the forum due to the "Invalid birthday" forum bug
I had to create a new account to post this because I've lost access to my old account. So this is what happened.
Apparently now your forum password expires after 65 days and you cannot access the forum...