I have reported this issue to the moderators. I, too, have desktop Premier on a Mac, and tried it out today. I am also getting some of those blank white screens. Ugh! I suspect something that happened with most recent update. Will try to circle back to you when they reply.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
