I previously disabled all add-ons for an upgrade and now receive the following error during the upgrade:
I can't get into the admin area at the moment either. I have already added $config['enableListeners'] = false; to config.php, but that didn't help either.
To elaborate, the solution for me was click the auto-update from the ACP (from 2.2 to 2.3.4) and after it finished downloading the files, do not continue, but rather SSH into you server, go to Xenforo root directory, and run php cmd.php xf:upgrade