Kid Control - apply times of internet access not possible

Hi,
while adding a new item, after giving the input for internet access all the data disappear after saving. All the other data (name, rate limit etc.) are saved but not the specific hours.
no firewall rules.
thx for help.

I found a solution this morning.

Adding a new user is still getting blocked in the WebFig.

Adding a user in the terminal works well. After that I can edit the User as well.

Thanks!