PTS Ver 12.1
I've already deleted all my game saves and started a fresh.
Last couple of days my routine: Start game: Get Error Screen: Ignore Error screen: Continue: Game starts with all mods missing from the current map ~ that's the active map on closure ~ happens on all maps that the game closes on.
To prevent that being saved I kill the game and start again, ignoring the error screen but going into the mod browser ~ game starts with two caveats ~ my mods are back where they were, or are put in storage. This is without any update actually being performed my the modder or Mods.io.