[404 ERROR ]Mautic Landing page not displaying issue

Your software
I have Mautic 2.15.3 install
PHP 7.2

My landing pages URL are returning a 404 error

What I am trying to achieve

  1. I am trying to setup my unsubscribed landing page using the BLANK PAGE THEME

  2. I have also configured my email setting to use the preference centre

3.I have also indicated in the specific Template email to use the UNSUBSCRIBE landing page i created when there is unsubscribe.

4.My unsubscribe link has the token {pagelink=3} inserted to link to page which contains the contact unsubscribe segments and an option to opt-out

These errors are showing in the log:

And here is the content on the landing page, as displayed in my preview from the editor

Steps I have tried to fix the problem:
I tried to use the default unsubscribe token

This works with my email configuration setup and this is the result

Assistance request
Please does anyone know how i can fix my landing pages URL returning 404 error?

would appreciate your assistance in this regard

cc. @dennisameling @rcheesley