Not so much an issue as a suggestion (apologies if this was stated somewhere else and i missed it):
In SBOLDesigner, one is required to put User Domain in preferences, along with name and email. It was not obvious, to me at least, that this should be "https://www.coursera.org/", but i did finally figure it out. Might help to add this to the instructions for Week 4 homework of Course 1, in the Specialization (EGC).