[SteamVR] Not Initialized (109) error resolution

[SteamVR] Not Initialized (109)

[SteamVR] Initialization failed. Please verify that you have SteamVR installed, your hmd is functioning, and OpenVR Loader is checked in the XR Plugin Management section of Project Settings.

VR equipment: HTC VIVE COSMOS

VR Plugin: SteamVR Plugin 2.7.3

 Unity version: 2019.4.40f1

Error scene: 

Every time after closing unity, open it again. Run the project, and then report an error.

Solution:

Re-open the Project Setting panel of the unity engine, and then close it. Error resolution. (Find Editor->Project Settings in the unity menu bar, after opening, click the cross to close the panel). Because I use git for version control, I found that the oid in the ProjectSettings.asset file will change every time an error is reported, so I thought it was related to Project Settings. Try reopening the Project Settings panel to solve it. If you use git for version control, you can try to restore the ProjectSettings.asset file to solve the bug. Pro test is feasible.