Just to bump this post, I am having the same issue. Just opened the game and started installing. Had about 25 games installed and now no games are installing. Is there a log file I can look at to find the error/traceback and post here? I would rather not delete "games.json" and have to reinstall all the games over again in addition to the ones I am looking forward to installing.
Is there a way to just bulk install all games at once? I was not able to find that and feel like it should be an option for users. I can understand some people would want to only have a few, but unless I am missing this I feel like this should be a default option for new users.