EACCELERATOR can’t restore parent class

Depending on the vBulletin version you installed on your hosting account, you may experience compatibility problems. The server’s log files generate the following error.

[23125] EACCELERATOR can’t restore parent class “vB_Bootstrap” of class “vB_Bootstrap_Forum”
[Mon Aug 12 14:17:51 2013] [error] [client xx.xx.xx.xx] PHP Fatal error: Call to undefined method vB_Bootstrap_Forum::bootstrap() in /home/user/public_html/global.php on line 26

You will have to reinstall EAccelerator on your server with command below OR disable it for your hosting account.
#/scripts/phpextensionmgr uninstall EAccelerator
#/scripts/phpextensionmgr install EAccelerator

If the problem persists, cPanel has stated that easyapache would address it in future editions.