Hi,
I have the settings correct and the Featured Image used to load on all posts pages.
Please visit my site for an example: http://feedup.ca/cute-pets-or-animal-cruelty/ .
I looked into the code and the following property might be an issue:

The display:none is causing the issue I’m guessing?
But my back end theme template has featured image turned on. Everything seems to be correct.
Please advise!
Generally WordPress cannot “enlarge” images; only make them smaller. This may not apply to your use case, but we use the “enlarge thumbnails” plugin to over-write WordPress disabling the enlarge function of image magick used by WP running on server back-end.
So, perhaps try using that plugin then regen thumbs and see if it works 🙂
Hi,
I have checked your site and found that somehow the template structure is altered and missing have you made any custom modifications to it. Please make sure that you download the latest theme version and update your theme using this guide and the FTP method: https://forum.tagdiv.com/how-to-update-the-theme/
Please let me now and also try this without any plugins active, just the VC.
Thanks
Thumbnail upscale plugin:
we use this with BOTH Newsmag and Newspaper to make the larger thumbs for home page sliders, and category featured pix, etc., since many of our old images were 500×375.
https://wordpress.org/plugins/thumbnail-upscale/
Admin may want to finally add this to the “suggested” plugins page for use with theme in addition to “regenerate thumbnails” …