Apparently some entries in the Windows registry are not correct, which Unity makes there. We have little influence on this. However, there is a small workaround that has helped some.

1. right click on the Windows icon and select "Run". 2.

2. type "regedit" in the open box and click "OK".

3. in the registry editor, locate and click on the Emergency Call 2 directory and delete it completely:

Computer\HKEY_CURRENT_USER\SOFTWARE\Aerosoft\Notruf 2

If you now restart Notruf 2 via Steam, it should work again. Leave a message if it worked... Thanks a lot!