Galactic Civilizations IV: Supernova Galactic Civilizations IV: Supernova Galactic Civilizations IV

... problem accessing ... Supernova user data folder ... file not found

Published on Saturday, June 27, 2026 By jungwirsch In GalCiv IV Support

When I start GalCiv IV in Steam on my Win11 desktop, a window with an error message appears:

"There was a problem accessing your Galactic Civilizations IV: Supernova user data folder. Error: Das System kann die angegebene Datei nicht finden. 

Please see our troubleshooting guide or post on our support forum for assistance."

The German part of that message translates to: "The system cannot find the specified file."

I let Steam verify the installation. 2 files were found wanting and replaced, but the problem persists.