Help creating spritefont on Mac using Content Pipeline tool. Null object reference error when building.

Can someone please help? It’s a default .spritefont file generated by the tool. Arial, 12pt. It shouldn’t be this hard.

I did try copying Arial.ttf to the same folder as the content file and the spritefont file and it didn’t have any effect.

For anyone getting this error, the Development Build of the Pipeline tool in the Downloads section fixed this issue.