Image URL broken or can not upload picture

Hello,

Please make sure the posts have featured images set tot them and the images can be found in the media library. Then make sure the thumbs are active in your theme panel:
This could be a plugin conflict so please disable all plugins except visual composer, clear cache and reset cdn files if you use it. Please also check any custom code you might have added to the theme panel or the theme files. If you use a child theme, please switch to the main theme to make sure it does not affect the proper functionality of the theme: https://www.screencast.com/t/U9e9TGUPrSe

Thank you!