related posts section not showing

Hi
Bit of a strange one. At the bottom of the posts page the related posts are not showing despite being switched on in customizer/shapely options/blog settings. When I am editing in customizer they are visible but disappear when I close the customizer. I have looked at the various bits of CSS I have but has no effect. Thanks in advance for your help.
The site is https://guided-mountain-walks.com

Hello there,

I hope you are doing well today.

Could you add a link to one of the posts that have the related posts displayed in the customizer?

Best Regards,
Support

Hi
If you go to the latest posts page (on main menu navbar) and then open the customizer on that page the recent posts are visible (but only within the customizer). I have attached a screenshot (one note) but by the look of the filename I don’t know if you’ll be a open them so I have also attached a scanned copy.
Thanks - let me know if you need my login details

Sorry, I misread your message - link below
https://guided-mountain-walks.com/wp-admin/customize.php?url=https%3A%2F%2Fguided-mountain-walks.com%2Falpujarras-trip-2016%2F

Hey there,

Thank you for replying with this information.

I’m seeing a console error, sometimes this is caused by a plugin conflict.
Kindly disable all of your third-party plugins and see if this issue still exists.

If it resolves the issue I am going to then ask you to activate the disabled plugins one by one and test the page to see if we can isolate the conflicting plugin if that is the case.

Best Regards,
Support

Hi
I deactivated all the plugins (except for Jetpack) and it didn’t have any effect. Also I did not deactivate Yoast or W3 Total Cache but I had only just installed these so I don’t think they have anything to do with the issue. The related posts are still showing but only when viewed through my customizer. As well as customizer/shapely options/blog settings there is a separate related posts option (just below additional CSS) which I don’t think was always there - that wouldn’t be causing a conflict by any chance? I have ticked and unticked all the options in the customizer/shapely options/blog settings and customizer/related posts so not sure what to do next.
Thanks

Sorry, also I did not deactivate the really simple SSL plug-in (I was a bit concerned about the effect having to reactivate it might have on my SSL)

Hi, just wondering if you had my more thoughts on how I can maybe sort this out
Thanks