I installed wp-cache to help with site speed. Shortly afterward, I was unable to access the site. Included below are the browser errors I receive. The site is hosted by GoDaddy. I asked them to restore my site from a nightly backup, which they tried to do but it did not work. They recommended I reinstall Wordpress and restore the database from a backup. I did both but the only database I have to backup is from today, after the problem started. I'm no expert regarding databases but if you are restoring a bad database, the site still going to have problems, right?
I researched wp-cache plugin problems and found solutions that worked for some but not for me. Maybe the problem is not coming from the plugin. But my site is completely down. I need help. Desperation set in a long time ago.
Here's the error when visiting the home page: Fatal error: Call to undefined function: wp()
Error when visiting /wp-admin Fatal error: Call to undefined function: get_option()
Error when visiting /wpadmin/upgrade.php Fatal error: Call to undefined function: timer_start()