If the Inside Locker box is showing up, that means that you’ve already properly set up the Inside Locker Template and the restrict conditions, but the restricted content is not properly set.
If you want to restrict specific content (text, buttons, images, videos) on a certain page, you need to place that content between the Inside Locker shortcode tabs.
You can set the content inside manually, or when you wanna add an Inside Locker over a specific Content, just select that content inside the Page content by dragging the mouse and after that Add the Inside Content using the red button: MP Locker. The shortcode will be set automatically in a proper way.
When you want to add an Inside Locker over specific content, just select the content with your mouse, and after that use the MP Locker red button. The shortcodes will be placed automatically and in the correct position.