What are you using (e.g., Valve Index, Quest 3 via Link, HTC Vive)? What graphics card is installed in your PC?
Review logs:
Corrupted software installation files can prevent the compositor from running. Open your Steam Library. Right-click and choose Properties . Select the Installed Files (or Local Files) tab. Click Verify integrity of tool files . Steamvr Error 475
Unstable builds causing software crashes. Step-by-Step Solutions to Fix Error 475 What are you using (e
Reinstall SteamVR and related runtimes
Boot your PC into and run DDU to completely remove your current graphics driver. Restart your PC normally. What are you using (e.g.