do you have any custom htaccess rules or redirect rules set on this domain ?
the login-url being read is being redirected to /login instead of the default /wp-login.php . This is usually something that can be controlled from security plugins or directly from htaccess.
Same behaviour is observed when i go to /wp-admin on your site, i am automatically re-directed to /login. Your domain has a re-direct rule somewhere, which alters the normal WordPress behaviour.
It is preventing the plugin from being able to filter out the admin from the Construction Mode template, which I would say in this case is not due to a fault of the plugin, it is simply a case of a custom configuration in the domain.
So far this is the only instance of this issue that has been reported, however I would like to consider allowing the user to set their login URL. That way if someone changed their login URL from /wp-admin to /login they would just need to set that option in the Construction Mode plugin as well.
I hope this gives you an idea what the issue could be. Thanks for giving me the URL, this ticket has been bugging me because I don’t want any issues like this in the plugin.
I hope you re-consider the low rating you gave this plugin, after this explanation.
thank you