When OptimizeMentor is first installed, we'll generate some default Membership Pages. These pages are essential and ensure that login redirects, and content protection work properly.
We do not force you to keep these pages, however if you delete some, or all of these default pages, you'll want to ensure that you have setup a replacement for the page.
If you get a 404 error, or Critical Error when one of the Mentor redirects kicks in, then it is very likely you may have removed the page without setting a replacement for it under "Mentor > Settings > Redirection Settings"
Just make sure all of these Redirection Settings have a page assigned in order to avoid seeing 404 or Critical errors on your site which could cause a bad user experience.
If you run into any issues that you are unable to solve please reach out to our team and make sure you provide your site logins and FTP or cPanel logins so we can try to help solve it for you.