Seems like the local data is corrupted.
- Try a verify / repair through GOG Galaxy.
- If that doesn't work; try to reinstall the game and manually remove the following folders (back up your Thronebreaker save games before that!):
- "C:\Users\<Your username>\AppData\Local\Temp\CDProjektRED"
- "C:\Users\<Your username>\AppData\LocalLow\CDProjektRED"