@uschmitt thanks a lot for that hint. Didn’t recognize this “new” fork.
Now it seems that I’m one step further as the module is not “loading” all the time but declares, that there are no recent calls to show. Unfortunataly, there are recent calls I’ve done for testing reasons. Right of the “no recent calls” text there the message, that an undefinded error occured. Have to check the logs an look in it, what that might be now.
EDIT: Now working, was just some authentication issue to the FRITZ!Box.
Again, thanks a lot!