Please see the link below, it should be engine bug The sky box is completely black
Skybox in editor seems to be loading fine here and reflections seem to be working as well:
look at chat
Chat works only for users added to the project. Did you change anything there?
Seems to be rendering fine on my side:
That is estimated to be a network problem, I will observe again, thank you!
Find the problem. It has something to do with the browser
Override software rendering list is enabled