[1.8.0-1.12.4] Kopernicus Stable branch (Last Updated August 12th, 2022) in Add-on Releases Posted March 6 12 hours ago, modus said: That all works fine for me. Assuming you installed everything correctly your log will have to be checked (by someone smarter than me). Okay, figured out my problem. I hadn't put the ModularFlightIntegrator Folder into GameData. Now it works! Thanks for your help!