UEVR can not save settings ingame if you have non standard character in PC username

I have the username grönbek and UEVR can not save settings changed because it does not recognize ö

[2025-12-17 19:48:12.543] [UnrealVR] [info] Saving config config.txt
[2025-12-17 19:48:12.543] [UnrealVR] [info] [VR] Saving camera offsets to C:\Users\gr nbek\AppData\Roaming\UnrealVRMod\AVGame-Win64-Shipping\cameras.txt
[2025-12-17 19:48:12.543] [UnrealVR] [info] Failed to save config