Never mind it was a case end user head gap error! I had the ground wire misplaced! :-/ SubMicro
Does it compile? Can you upload the code? Does it work? If so, the only "bug" is that the Serial1 name is not colored correctly. Color coding is based on the contents of some text files, that apparently haven't been updated to "know" about the Mega with it's multiple hardware-based serial ports.