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Checksum is not matching in multiplayer

A checksum will be different if…

  • Files are different (both mods or game)
  • Mods load order are different

In order to solve a checksum issue, execute in following order…

  • Verify vanilla game’s files via steam (right click > properties > local files)
  • Always besure you have the same load order as your friend(s)
  • Run the game, host a local multiplayer lobby and go in the. Community Flavor Pack should be listed. If not, report to CK3 Launcher re-init