In particular, the Get Asset and the Get Cretendtial activities just hang when I press Run, and the only way to get UIStudio to start doing something again is by ctrl-alt-del and killing the process. Using buttons in the debugger, like Stop do nothing at all, and pressing the close button in the top left promises to stop the app, but that promise is not kept either.
UIRobot appears to work fine, as I can start the automations mentioned in earlier lessons.
To run properly, Robot service needs to match your Studio version. I am not sure what happened that you have a Robot service with an Enterprise version and Studio with the Community version, but I would suggest you to remove all installations of Studio from your machine and then reinstall Community Edition.