Reply To: 8.12 Upgrade created an error

@ Kristopher

Is there perhaps some custom code developed for Connections on the site? I could see how an error such as this could occur if there was some “unofficial” custom code for Connections. So maybe deactivating all other plugins are try and and update will succeed.

Try turning on WordPress debugging and enable error logging. The fatal error should get logged and provide a clue as to what is going on.