@cipherdicer442: How did you proceed?
I’m sad, but this is no solution for me. I don’t have installed the plugin subscriptions.
Hello Mike, thank you for your hint. I have updated my Woocommerce Plugin again and cleared all caches: my bowser cache and the caches on my server. But still my settings under Woocommerce are broken. It looks like this:

But it seems, there is nobody here, who can help us?