@wyrmworksdale
This was my solution for https://camper.help/newletter. All users were not able to unsubscribe.
The suffix in the URL was ignored and always the blank native Newletter page was opened.
There seems something changed internally in the plugin “Newsletter – Forms”. I used until some days the shortcode [tnp_code id=”1″]. This was wrong. Until I changed to [newletter] it is working again, that my user can unsubscribe or manage their profile.
Hope this help.
Kind regards
Flo