Kind regards.
]]>the Access Denied message comes up for a non-logged in user;
Unfortunately this is not coming from our plugin. I tested this today in my dev site to make sure the protection of pages and post displays the correct message. You might be running another membership or security protection plugin in your site.
The following documentation provides information about content protection.
https://simple-membership-plugin.com/apply-content-protection/
Let me know if the above helps you.
Thank you.
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