I had the same issue, for me it was setting the Performance in Planet Shine to Medium.
In particular the issue was having pixel mode instead of vertex mode turned on.
I am getting some spam in my console .
(Filename: Line: -1)
NullReferenceException: Object reference not set to an instance of an object
at CityLights.LocalCityComponent.OnPreCull () [0x00000] in <filename unknown>:0