"An error was encountered" while exiting a game on the dev server

After I click on the Exit Game button, I get that screen. Happens with Chrome and Firefox. OS Windows 10 Error code on one of the latest errors:  618e6b1aca7b4c168ff2ea535cea87ff

Hello Doug E., Please carefully work through to the first three steps of our guide to Solving Technical Issues : Step 1: Make sure to use the right browser  Please check if these issues persist when using both Chrome and Firefox.  Looks as though you've tried this step. Step 2: Ensure that there are no extensions or addons interfering with Roll20.  Please disable all add-ons/extensions. Step 3: Clear your cache.   If none of the above succeeds, please thoroughly work through Step 4.  (Don't forget the complete Console Log!) Thank you!