Problem
The centre dropdown is empty.
Possible cause
You must have at least one centre created and linked to your user to create a class. If the list is empty, no centres may have been created, or your user does not have access to any.
Solution
Check that at least one centre has been created in the system.
Check that your user has access to the desired centre.
Contact an administrator if you believe you should have access.
If the problem persists, contact support and include details about:
Your user role.
Whether other users can see centres.
When the issue occurred.