Edit post link 404’s if WP Admin link is not wp-admin

Hi, wondering if there is a workaround for this, even if I have to alter the plugin code. For security reasons we have changed our WordPress admin login from wp-admin to sng-login using the WPS Hide Login plugin (https://www.ads-software.com/plugins/wps-hide-login/) to prevent brute force attacks. It has worked very well, but we just discovered that in our Post status notification emails, the “Edit the post:” link now 404s because it uses wp-admin ;-(

Edit the post: https://starnewsgroup.com/wp-admin/post.php?post=73414&action=edit
Preview it: https://starnewsgroup.com/?p=73414&preview=true

For now we are telling our authors/editors to just go into the admin and locate the post manually, but as you could imagine, some of them are having a hard time with anything that deviates from the normal course of their activities ;-( So any guidance you can provide would be most appreciated!

The page I need help with: [log in to see the link]