Question or concern about the FlyWire interface? Not sure how to use certain controls, if certain features have been made available, or where something is located?
If you get that error message again double clicking on your segment in 2D to remove, and then double clicking in the same location again to get the segment back might fix your problem. A black lightbulb also indicates that the segment is not in its most recent version (though I can’t see here what color the lightbulb was)