Cannot connect to Google Home with myOpenhab

after asking the question in the main channel for GH, I got told that I should make a new Topic for this. So I cannot connect to GH with myopenhab account, it’s always saying couldn’t establish connection check your network. I already reinstalled OH, reinstalled OpenCloud Binding (3 times by now) and I am in the same network and same language as my GH.

I have one item visible in the Cloud and it’s online.
Thanks in advance