Hi,Thanks for your swift answer. I unchecked all the notice to manager boxes and that indeed did the trick. I can sign up now.
But now I wonder, where do I assign a manager? Do the teachers get the notices automatically? It would be great if you could assign a manager per session. In my situation sessions are facilitated by different people who would like to keep track of their participants. I can't find a setting for assigning a manager. (Will scan this forum of course.)
And yes, found it. You need to make a profilefield with managersemail and then it works!