Breadcrumbs Not Showing Up on Pages or in Forums

I would like to add Breadcrumbs to my pages on the website.

I've tried following the instructions for Yoast plugin of adding code to single.php and page.php. I've tried adding Breadcrumb NavXT plugin and Awesome Breadcrumb plugin but none of them show the breadcrumbs.

Is there something in my site that is preventing it? How do I fix it please.
Support access is granted.
Thank you.