I have tried many times and searched for many pages and information about this problem,Which is that the Steam VR can not detect any UE4 VR projects ,even VR template.
Anybody can help me?
And my last question was that the VR preview mode button is grey,I had solved this by myself.
You just need to go into your plugins,and enable or disable one of other VR plugins, such as Google VR,Gear VR,etc.
And restart the project ,the problem will be solved.