Public Sim2h Server no longer working

I am currently trying to test a small hApp of mine, with two laptops. Both conductor-configs are configured to connect to the public sim2h_server (url: ‘ws://’). Another hApp that basically had the same conductor-config worked with the public sim2h but that was about week ago.

Now the question: Is it possible that the server is currently down, or am I just doing it wrong?