Apparently the HDRI backdrop features are great, but reviews say it’s pretty finnicky. It works great until it doesn’t. Check out this thread entry here- they have some default settings you can attempt setting it to.
That being said, you don’t NEED an HDRI backdrop… But it could mean something is wrong with the skysphere.
Also, just for good measure, maybe try a validation check of your engine version with the launcher! It could be a corrupted file that’s not corrupted enough to cause a crash, but enough to cause a bug.