I am running 22H2 (OS Build 19045.3448)

At some point I registered at

ASRock Forums

The forum does not recognize my username, let alone my password. It does not recognize my email address.

I tried to sign up again and the page opens with my username/PW as stored in my Google Chrome passwords.

How to I communicate with the Administrator that the forum software recognizes me with one hand and refuses with the other?