Edit event in frontpage as super user is only possible with release in backend

If I edit an event of JEM v4 in frontend as super user (allowed only for super users) an error page is shown at save (page does not exist). At back end a release symbol is shown at the event but clicking on it has no effect.

I know it is ennoying,but please give always concrete joomla and jem infos.
I can't reproduce, so I can't help!

Installation PHP 8.1.19, Joomla! 4.3.4, JEM v4.1.0
The events are old events taken over from JEM v3.

only to ask (this depends, if you took the events from JEM in Joomla 3-export/import): did the user ID change? Each new installation creates a new admin user ID.
.
[by the way: the old JEM was v2 there was once a trial v3 but this branch is broken!]

This previous post is wrong!

It still does not work.
At events in backend a member can be selected. The selected member is a super user. If this member tries to edit the event at front-page an error page is shown, that the page does not exists. As said this are old events taken from JEM v2.