I get this error opening My project in UE 5 preview 
It works when disabling dx 12 and use dx11 instead before opening… Also using raytracing and stuff… what can i do to get it to work? I tried to start a new project and then migrated scene and assets but same error message:(
It seems like there is 2 specific assets that causes this! THey are both metallic. Using Lumen reflections…hmm