Yeagerbuzz

Hi, Does anyone have a fix for this? I have exactly the same problem. It did work ok then suddenly when I load up DCS and it goes to a grey screen. It works fine with MSFS and when you are in the cloud rooms (or whatever they're called!) it initiates in SteamVR for WMR but as soon as the game loads I get the grey screen? The pc screen shows that there is no tracking on the headset i.e. no movement when you move the headset but I do get the sound. Can anyone help me?