This is covered in the migration tutorial which is in progress of being moved to the official docs.
The following isn’t an accusation or a “RTFM” comment. Did you know about and read the tutorial? Did you know about the admittedly lacking tutorial on the main docs page? If so please tell me which parts were confusing or lacking so I can address those. I’m currently working on it right now.
I am surprised you needed to enable more detailed logging to see that error. You should see errors like that with the logs at the default level. That is of concern. Can you tell me what you changed to see the error?