Make error message more explicit so that it's easier to infer what's wrong.
Make error message more explicit so that it's easier to infer what's wrong.

dpad/sumatra,babsey/sumatra,babsey/sumatra,apdavison/sumatra,open-research/sumatra,babsey/sumatra,maxalbert/sumatra,apdavison/sumatra,open-research/sumatra,apdavison/sumatra,maxalbert/sumatra,dpad/sumatra,dpad/sumatra,dpad/sumatra,babsey/sumatra,maxalbert/sumatra,open-research/sumatra,babsey/sumatra,dpad/sumatra,apdavison/sumatra,open-research/sumatra,open-research/sumatra,apdavison/sumatra,maxalbert/sumatra,maxalbert/sumatra