I cannot access the admin panel, even though every other page works.
Thats more support then a bug.
You need to be more descriptive.
Why can't you?
Do you receive an error?
What version of MyBB are you using?
Are you on a free web host which places ads on your page?
Umm, the first, I dont know
no error,
the newest
It is a free web host, named quotaless.