It is a shared server with Blue Host.

I called them back and they had me on hold for awhile before telling me that the error log is in the root directory, and, as they don't even have access to that, they have issued a ticket for the Level 2 Techs to look at sometime tomorrow, this being Sunday.

I hope they will resolve the issue tomorrow.

Why do they have Mod Security in the first place??? Does it actually protect them???