I was using UE 5.1.1 and both glb and gltf caused UE to crash. The export options were default…trying to think if there was anything I turned on or off, but just the default settings causes UE to crash. Interestingly, OBJ legacy version was able to import the scene relatively ok, though I suspect some details are lost. We really should be able to export gltf - that’s the format that translates best from platform to platform. DAE Collada is even better but that’s not available for UE.