Wix Bookings: my service is planned in my agenda but users can't buy it

Question:
I have been making services for more than a year and never had this problem. I make the service, schedule it in my planning and website visitors can see it on my website. I did the exact same thing this time and my service is visible but there the website says ‘there is no available date’. It IS planned in my schedule so I don’t get why it won’t work… Anyone had the same issue?

Product:
Wix Bookings

What are you trying to achieve:
Clients can book my service.

What have you already tried:
I tried making multiple staff members because I thought the issue could be that there were double bookings but this didn’t solve anything. Tried remaking my services…

Additional information:

What do you suggest? I tried scheduling on another date, remaking the service, duplicating, …