Simply put, Just bought this plugin but I can't use

Simply put, Just bought this plugin but I can't use shortcodes on the site.

Example: Check the "Join Us" page.

I added:

[ms-membership-signup]

[swpm_login_form]

The second row was just for testing, which doesn't work.One of the shortcodes are working... but not the other.

The one that is supposed to work: [ms-protect-content id="1004"] also doesn't work.