Error message, send to developers

Has anyone else seen this message while uploading to Pavlovia? I also got a notification to send this to the developers:

Traceback (most recent call last):
File “/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/psychopy/app/pavlovia_ui/project.py”, line 166, in submitChanges
AttributeError: ‘NoneType’ object has no attribute ‘project’