After upgrading from 2.7.1 to 2.8 this message appeared...
Database Upgrade Required
WordPress has been updated! Before we send you on your way, we have to upgrade your database to the newest version.
The upgrade process may take a little while, so please be patient.
<Upgrade WordPress Database>
Once <Upgrade..> was pushed this message came up...
Your WordPress database has been successfully upgraded!
Everything works fine except individual posts will not display encountering the message.
The page you are trying to view is no longer avaliable. Please go to http://example.com and search from the home page.
How can this be resolved? Thank you