XF 2.1 What Happened?

[vtcnc]

An exception occurred: [Exception] Could not find class SV\ExpiringUserUpgrades\XF\Entity\User when attempting to extend XF\Entity\User in src/XF/Extension.php on line 174

2. XF\Extension->extendClass() in src/XF/Mvc/Entity/Manager.php at line 53
4. XF\Mvc\Entity\Manager->getEntityClassName() in src/XF/Mvc/Entity/Manager.php at line 123
6. XF\Mvc\Entity\Manager->find() in src/XF/Repository/User.php at line 24
8. XF\Repository\User->getVisitor() in src/addons/Snog/Groups/XF/Repository/User.php at line 10
10. Snog\Groups\XF\Repository\User->getVisitor() in src/XF/App.php at line 1773
12. XF\App->getVisitorFromSession() in src/XF/Pub/App.php at line 154
14. XF\Pub\App->start() in src/XF/App.php at line 2180
16. XF\App->run() in src/XF.php at line 391
18. XF::runApp() in index.php at line 20

 

[vtcnc]

....aaannnddd, it is back up.