When you enable automatic organizer assignment (round robin), the customer selects a date and time without specifying who will lead the meeting. Therefore, the price must be known at the time of booking and must be the same regardless of the assigned organizer.
If you have prices assigned to specific organizers, round robin will not be available.
You can choose one of two options:
Do you want to use round robin? Set up price options available to all organizers.
Do you want to keep individual prices? Disable round robin. The customer will select a host and see the price applicable to them.