If a Team Manager or Coach states when they register it has an error message saying "You do not have any matching payment plans to choose from. Please contact your organization administrator to complete registration."
How to troubleshoot
Go to Events -> Team Registrations -> you can narrow the search for finding the Team's registration by using the filters.
Check the Event age and gender of the Teams registration.
Go to your Event the Team is registering for -> then click on Registration Fees
Check to see if the age and gender of which the player is, attached to any fee on the registration fees page.
If none of these are matching with the Team's registration, this is the reason why they are getting the message.