Cannot Adjust Working Hours (Availability) And Other Service Settings

Hello,

since about 1 week, the employee (with role "Team Member") cannot change the working hours (availability) and other service settings like the booking window etc. Any adjustments made won't save.

How can this be solved?

Although I am not assigned to this particular booking as an employee with role "Administrator", I used to be able to change these settings too as an overall administrator. But now, I can't even add more employees to this booking or change the role of the existing.

(https://learn.microsoft.com/en-us/microsoft-365/bookings/employee-hours?view=o365-worldwide)

Hope it can be solved.

Best regards,
Julian