Cron Job not running in Snap

I updated to Nextcloud Snap Version 25 and the cron job does not work:
The cron job is not running and is marked red under “Settings”, because the last instance was the last reboot of the server.

When i change the intervall with:
sudo snap set nextcloud nextcloud.cron-intervall=1m
There is no error but also no change in it’s behavior.

How do i manually start the cron.php in a snap installation?
In the moment starting the cron.php is only possible by browser.