XF 1.5 Error for ACP homepage and thus unable to load/display the ACP homepage


Well-known member
I removed a few disabled add-ons from within ACP a couple of days ago.
Now, when attempting to load/display the ACP homepage I get an error and it won't load ...

An exception occurred: Class name must be a valid object or a string in library/XenForo/Model/Node.php on line 521

XenForo_Model_Node->getNodeHandlersForNodeTypes() in XenForo/Model/Node.php at line 822
XenForo_Model_Node->getNodeTotalItemCounts() in XenForo/Model/Counters.php at line 16
XenForo_Model_Counters->getBoardTotalsCounter() in DailyStats/Model/Counters.php at line 7
DailyStats_Model_Counters->getBoardTotalsCounter() in XenForo/Model/Counters.php at line 37
XenForo_Model_Counters->rebuildBoardTotalsCounter() in DailyStats/Model/Counters.php at line 76
DailyStats_Model_Counters->rebuildBoardTotalsCounter() in DailyStats/ControllerAdmin/Home.php at line 7
DailyStats_ControllerAdmin_Home->actionIndex() in AttachStats/ControllerAdmin/Home.php at line 7
AttachStats_ControllerAdmin_Home->actionIndex() in XenForo/FrontController.php at line 351
XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
XenForo_FrontController->run() in admin.php at line 13
Loading other ACP pages directly works fine, eg. /admin.php?options/

The add-ons referenced in the above error are https://xenforo.com/community/resources/mws-daily-statistics.2111/ and https://xenforo.com/community/resources/mws-attachment-statistics.1654/ and are both still installed and active.