I checked cookie locations and cleared browser settings.
I can't get to Admin CP. I can get to User/Mod CP but not Admin CP.
I also have almost no info on my site yet so uninstalling/reinstalling is an option.
I had these values but ran query anyways but no difference. Still can't get into Admin CP
update mybb_users set usergroup = 4 where uid = 1
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator to inform of the time the error occurred and of anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
As the error says, check the server error log
I never found reason just reinstalled and am posting warnings from new site in new post.