[subscriptonform] is not loading inside the template file

I have a problem with the membership plugin loading the shortcode [subscriptionform] inside my template file.

I have added a page inside admin-panel with the name Membership. It includes the shortcode [subscriptionform]. The page Membership uses the custom template attribute – regmembers – which points to the template file regmembers.php.

The problem is the shortcode [subscriptionform] is not loading inside the template file regmembers.php.

Where does the shortcode [subscriptionform] point to? Could I hard code the subscriptionform inside the template file regmembers.php? Or is there an easy fix for the problem?

Thanks.