By default after the plugin is installed and activate it will automatically create a page for registration. 

If registration page is NOT create after plugin is activated, create new page and add this shortcode [wpcmerch_registration].

To add shortcode using the Gutenberg page editor follow this steps.

• Login to your admin dashboard
• Go to Pages -> Add new button
• Click the plus ( + ) in the upper left corner of the page and search for shortcode.
• Then add “[wpcmerch_registration]” in the shortcode editor.
• Then Click “Publish” button at the upper right corner of the page.

Note: Make sure that the Page Attribute Template is NOT set to “WPCargo Dashboard“

Note: If the registration page is redirecting to Login page set the page attribute template into “Default Template“. see step 5