Using email address as username leads to server error 500

[fquadt]

Hi,

since the username is (according to the german label) allowed to have letters, numbers and characters like "@", ".", and "-" I added a user and entered his email address as username in the django management center. The user account is created successfully.
When I switch back to the mediacms frontend, open the users list and click the newly created user to open his profile I get a server 500 error.
The debug.log prints
django.urls.exceptions.NoReverseMatch: Reverse for 'edit_user' with keyword arguments '{'username': '[email protected]'} not found. 1 pattern(s) tried: ['user/(?P<username>[\\w@.]*)/edit$']
Any ideas? Is it actually forbidden to use email addresses as username?
This problem blocks the user from changing his password to get access.

Installation:
mediacms installed with ubuntu installation script on ubunutu 22

Thank you in advance.
Florian