No live preview & SEO plugin cannot find content on page When I try to live preview my craft site the content of the live preview is blank:

This is happening for all pages.
I have set the template file for the page to use:

I am running Craft Solo 3.6.12
Something that is also kinda odd is that the SEO plugin I am using cannot seem to detect the content on the page, my suspicion is that these two things are linked:
SEO plugin:

I get an odd error when trying to use the SEO plugin for key words:

I have looked at some of the issue on github but have not been very successful finding a solution so if anyone has come across this before and could offer some dev wisdom that would be great.
Please ask any questions you might have,
all the best - W
Pretty simple answer - the .env file was not showing the correct primary site i.e.
PRIMARY_SITE_URL=https://www.XXXXXXX.com

http:// XXXXXX 

should have been
https:// XXXXXX

very embarrassingly for me, this error was clearly displayed in the console log of the live preview site i.e.

navigate to the live preview page
enter dev tools
view console for the log errors

There is also another post of this issue as well:
Live Preview not loading - https / http conflict
(I'd like to suggest this post be left open as I had previously seen that post but did not attribute it to this issue - possibly due the double digits spent infront of the screen...)