Content Protection Shortcodes not working


I installed the membership plugin yesterday and am having trouble with the content protection shortcodes (both more & the access-level specific shortcodes). I'd like for all users on the site to be able to click on content and see a preview, but then request signup by visitors (strangers) to read the full content, as your content protection section is supposed to do. However, upon using the shortcodes, nothing changes...the content remains visible and the shortcodes are also visible on the frontend.

Any suggestions?

Thanks in advance for your help.