I have the same “You do not have sufficient permissions to access this page” problem, but the differences are:
1. I can’t even log in to the dashboard
2. I could login normally yesterday
The only thing I could try is erasing the “wp better security” (that seems to have caused this issue to many others) via my ftp, but still nothing.
I tried to do the chance YossarianC suggested, but my ftp won’t let me save or replace my wp-conflig.php file.
Could anyone help???
Thanks!