• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.

XF 1.4 Upgrade 1.4.6 > 1.4.8 error

Failed to get controller response and reroute to error handler (XenForo_Install_Controller_Upgrade::action)
An exception occurred: Constant DISABLEIPDENY already defined in /home/www/web3241/web3241u1/html/library/config.php on line 16

define() in config.php at line 16
require() in XenForo/Application.php at line 616
XenForo_Application->loadConfig() in XenForo/Application.php at line 265
XenForo_Application->loadDefaultData() in XenForo/Install/Controller/Abstract.php at line 10
XenForo_Install_Controller_Abstract->_preDispatchFirst() in XenForo/Controller.php at line 304
XenForo_Controller->preDispatch() in XenForo/FrontController.php at line 346
XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
XenForo_FrontController->run() in /home/www/web3241/web3241u1/html/install/index.php at line 18
Never had this issue before. My forums are currently locked out due to an impending update.


XenForo moderator
Staff member
This could be a firewall issue.
Try adding this to library/config.php:

define('DISABLEIPDENY', true);