Conflicts with core and other contributed module functionalities

Problem/Motivation

Popup message has conflicts with core and contributed other module functionalities.

Steps to reproduce

Installed Popup message
For test purposes I had it show a pop up on only one test page. "mysite/test_page"

This affected my Full calendar view page.
Conflict with Fullcalendar View module see https://www.drupal.org/project/fullcalendar_view/issues/3417079 🐛 Toggle Month (list) broken - solved Closed: works as designed
This also affected image upload using the (entity browser) functionality

I changed the settings in Popup message so that it uses the exclusion method (Only the listed pages)
It now shows on all pages except for admin pages and my Full calendar view page.

The Full calendar view page is now working as it should.
The image upload functionality has been restore.

This workaround is good, but it is a real headache to learn this.
Perhaps this should appear somewhere in the documentation for this module.