have you replaced admin folder name in ~/inc/config.php file & are you trying to access correct admin folder ?
Yes, I have.
It worked before like a charm and then suddenly stopped working.
So, any suggestions?
Bump!
Have you maybe replaced the original admin cp with the honeypot? o.0 then it will not work. you need to rename the original acp (admin folder) to something other instand of replacing all files with the honeypot.
Umm, I just tried to access my admin cp right now and it works... (I haven't done anything) It's a miracle. I have no clue what was the issue.