As per the title I am trying to run a testlive server with this mod with no success, it starts, gets so far then shuts back down with an error, removing the mod lets the server start and run. Currently using Testlive Patch (01.05.2020) Followers II Rev.4, also did it with v3.

This is a bit concerning as they are hoping to release this update to the main next week and there may be a few servers not working once they do.