If it was working in the previous version, I don't think that is the cause.
If the game does not start even when VR is not used, then I think the root of the system is the cause.
The game is developed in Unity, although I recently upgraded the version of Unity used for this game. So far, I can only think of this version upgrade as the cause.
However, downgrading is not possible at this time due to the system we are using. I am facing a wall.