I'm running patch 12.2.2 on OSX with the 12.2.0 update db. I don't have any other DB changes loaded other than the essentials + a few nations from most of the continents. I have added a few nations to fix the other errors but I still can't use England as a playable nation. Might this be an issue...
I seem to be having an issue trying to setup a game with your database changes. It seems a team or so is missing in a few of the leagues. I have attached a screenshot showing the error I get.