XF 1.5 Upgrade to 1.5

[silence]

Failed to get controller response and reroute to error handler (XenForo_ControllerPublic_Post::action)
An exception occurred: Undefined index: use_tfa in /home/fdsa/public_html/xenforo/library/XenForo/Visitor.php on line 678

XenForo_Application::handlePhpError() in XenForo/Visitor.php at line 678
XenForo_Visitor->offsetGet() in XenForo/ControllerPublic/Abstract.php at line 269
XenForo_ControllerPublic_Abstract->_assertTfaRequirement() in XenForo/ControllerPublic/Abstract.php at line 25
XenForo_ControllerPublic_Abstract->_preDispatchType() in XenForo/Controller.php at line 310
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/fdsa/public_html/xenforo/index.php at line 13

All files have been uploaded so I'm confused as to whats wrong.

 

[silence]

I can't login to the admin panel either:

{"error":"Undefined index: use_tfa","traceHtml":"\t<li><b class=\"function\">XenForo_Application::handlePhpError
()<\/b> <span class=\"shade\">in<\/span> <b class=\"file\">XenForo\/ControllerHelper\/Login.php<\/b>
<span class=\"shade\">at line<\/span> <b class=\"line\">14<\/b><\/li>\n\t<li><b class=\"function\">XenForo_ControllerHelper_Login-
&gt;userTfaConfirmationRequired()<\/b> <span class=\"shade\">in<\/span> <b class=\"file\">XenForo\/ControllerAdmin
\/Login.php<\/b> <span class=\"shade\">at line<\/span> <b class=\"line\">132<\/b><\/li>\n\t<li><b class
=\"function\">XenForo_ControllerAdmin_Login-&gt;actionLogin()<\/b> <span class=\"shade\">in<\/span>
<b class=\"file\">XenForo\/FrontController.php<\/b> <span class=\"shade\">at line<\/span> <b class=\"line
\">347<\/b><\/li>\n\t<li><b class=\"function\">XenForo_FrontController-&gt;dispatch()<\/b> <span class
=\"shade\">in<\/span> <b class=\"file\">XenForo\/FrontController.php<\/b> <span class=\"shade\">at line
<\/span> <b class=\"line\">134<\/b><\/li>\n\t<li><b class=\"function\">XenForo_FrontController-&gt;run
()<\/b> <span class=\"shade\">in<\/span> <b class=\"file\">\/home\/fdsa\/public_html\/xenforo\/admin
.php<\/b> <span class=\"shade\">at line<\/span> <b class=\"line\">13<\/b><\/li>\n"}

 

[silence]

Nevermind:

Not a Bug - Undefined Index 'use_tfa'

 

[Mike]

Just to confirm to anyone seeing this, you need to complete the upgrade by going directly to the upgrade URL (which is the recommended approach: Upgrades | XenForo).