Services will appear as "infinite online" if there are no qualified staff which have been set as available for online bookings. If all services are set to infinite this means that all of your staff have been hidden from online bookings.
Step-by-step guide
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Services will appear as "infinite" for online bookings if staff members assigned to that service are not qualified
If this occurs you would just need to locate that staff member and check that they are qualified for that service.A service which is not qualified by that staff member will be unticked:
This can also occur if all staff members who are qualified for that service have been hidden from online bookings.You would simply need to untick the "Hide from Online Bookings" box on all staff members that are qualified for that service.
Here is a link on how to hide staff members from online bookings: