Unfortunately, we have no clue. 🤷🏻♀️
Please note that this issue is related with the use of Paid Memberships Pro, not with the use of your theme. It’s best if you try to reach the plugin authors as they will be more informed and better suited to help you.
To go further, we invite you to post your request on their support forums: paidmembershipspro.com/support/
We remain available for all support requests related with the use of your theme.