Problem
The Applicable membership types dropdown is empty.
Possible cause
Membership types are loaded from the system when the page opens. If the list is empty, there may be no active membership types configured yet. The dropdown is also only shown when the discount code is available in one centre or fewer.
Solution
Reload the page and check whether the types now load.
Check that your system has at least one active campaign, membership, punch card or personal training membership created.
Check that the discount code is only available in one centre — the field is hidden when there are multiple centres.
If the problem persists, contact support and include details about:
Whether active membership types have been created in the system.
When the issue occurred.