XF 1.5 Invalid model 'XenForo_Model_UserGroup' specified

[talk2troy]

Thread started here: https://xenforo.com/community/threads/no-customer-could-be-found-with-that-email-address.153521/

I was able to DL the XenForo 1.5.15 update & upload via FTP, ran the update and got the upgrade confirmation & accessed my admin dashboard !!!!!!

My first goal was to update my user / PW, so I clicked LIST ALL USERS - but I am getting errors.

FULL CONFESSION: before I came here for help, I mucked around in mySQL and deleted all users that looked like SPAM, and got down to just me (my forum is not live / public but I have applied a style / theme & sub-forums, etc). I was mostly just learning to use the software, but don't want to lose what I've done so far.

I am down to just one user now & can see myself listed as super admin / admin / super mod but when I go to USER INFO:

Admin Control Panel - myURL.com/forum
Server Error
Invalid model 'XenForo_Model_UserGroup' specified

1. XenForo_Model::create() in XenForo/Controller.php at line 101
2. XenForo_Controller->getModelFromCache() in XenForo/ControllerAdmin/User.php at line 1476
3. XenForo_ControllerAdmin_User->_getUserGroupModel() in XenForo/ControllerAdmin/User.php at line 311
4. XenForo_ControllerAdmin_User->_getUserAddEditResponse() in XenForo/ControllerAdmin/User.php at line 360
5. XenForo_ControllerAdmin_User->actionEdit() in XenForo/FrontController.php at line 351
6. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
7. XenForo_FrontController->run() in /home1/X/public_html/myURL.com/forum/admin.php at line 13

Basically, I get errors with anything under the USERS menu (create new, batch update, etc)

 

[Paul B]

Considering you have manually deleted content from the database, which will have created orphaned records and corruption, etc. I would recommend starting over with a new installation.

 

[talk2troy]

ok, I'll just give up on having a forum.

 

[Ozzy47]

Why give up on a forum, simply start over, or restore a backup that was taken before you messed around in the DB?

 

[talk2troy]

Just personal reasons. It was a hobby - idea - experiment from 2 years ago w/ no backups. Xenforo was easy to learn & set up & style but I won't do it over until or "if" I decide my new idea is worth it this time. I just wanted to resurrect my install to brainstorm a "first draft" in software vs on paper (I already drew it up on paper & started a wordpress entry point - just need to validate w/ potential user base and giving them a link to a draft site vs a doc would be more fun). If I go forward, I probably want v2, new style, etc. Need to read about the update cost too.