According to the error you've an issue with jw_superblogger. I recommend uninstalling this or disabling it via your database using phpmyadmin to see if issue is resolved. Appears to be trying to locate an article that doesn't exist? Please consult with the developer of this extension for further assistance.
The extension appears to be a Joomla plugin, btw; so when viewing database you're looking for the table: jos_plugins