I have a Cesium application that I haven't worked on for a few months and decided to come back to it recently. When I last left the application there were no issues with the layers. Now when I start up my application the base layer seems to load and is added the the layer list but does not display. You can just see straight through the globe and see the dark starry sky. Does anyone have any idea what the problem could be? When I switch to 2.5d and 2d map view the layer displays just fine.