I am having an issue with my site running very slowly at times. After speaking to a member here and to my host, we determined the likely cause was my site was not being cached. So, I tried to set that up through the library/config.php file as instructed here but now I cannot access my site and get this: An unexpected database error occurred. Please try again later. I removed the added code from the library/config/php file but I still get the same message. Can anyone tell me how to fix this?