XF 1.2 Server Error: Undefined Index: Is Admin


Active member
I opened my forums to the public and now this error is poping up over the entire forum -_- its been working fine for the last few weeks not sure what it means.

Server Error
Undefined index: is_admin

  1. XenForo_Application::handlePhpError() in XenForo/Visitor.php at line 409
  2. XenForo_Visitor::setup() in XenForo/Session.php at line 275
  3. XenForo_Session::startPublicSession() in XenForo/Controller.php at line 291
  4. XenForo_Controller->_setupSession() in XenForo/Controller.php at line 304
  5. XenForo_Controller->preDispatch() in XenForo/FrontController.php at line 346
  6. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
  7. XenForo_FrontController->run() in /home2/ablac/public_html/index.php at line 13


Active member
I have learned it only pops up for me, and my IP address only. which makes it strange. Everyone else can access the site fine.


XenForo moderator
Staff member
Which add-ons do you have installed?

Try disabling them and see if the problem still occurs.