Is anyone having trouble (firestorm) logging on to files in c-panel?
It looks like your account is significantly over its allowed quota which is causing cPanel to return errors because it doesn't have room to store/save cache files while you're using it.
How do I fix that?
I'll reply to your PM so we can finish the discussion there, but in case anyone else experiences this issue in the future, we either need to upgrade your account or clear out space (via ftp) to where you storage usage is less than your defined quota.