RapidMiner Studio Hangs on Launch "Initializing Plugin GUI"

RapidMiner Studio 8.2 on MacOS 10.13.4

When I launch RapidMiner Studio, the program starts to load, but hangs on the step "Initializing Plugin GUI" and wont finish loading.  If I disable "Initialize Extensions" the the program will load, but obviously it will not have any extensions, including "Auto Model".  What is the root cause of this problem and how can I solve it beyond just disabling "Initialize Extentions"?  It does not seem to be related to any individual extension as if I disable all of them in the extension manager, it doesn't solve this problem.