Thanks for all the info. Please help if you can! WebSharks says
If all else fails you can always login via FTP and delete the following.
/wp-content/advanced-cache.php
/wp-content/plugins/quick-cache/
Problem is, I can’t find the /wp-content/advanced-cache.php file anywhere! I did delete /wp-content/plugins/quick-cache/ successfully, but the problem still exists. Thank you!