Hello,
First of all, thank you for your purchase.
I checked images from the RSS feed you linked, and the issue is caused by the source site blocking access by some security measures to their images, if they are linked from unrecognized domains.
Unfortunately, showing images with this kind of protection on other domains is not possible. Please read more about this, here: https://stackoverflow.com/questions/10636611/how-does-access-control-allow-origin-header-work
I recommend removing images from posts, using the ‘Strip Images From Post Content’ checkbox from importing rule settings.
Please check the security error that I got in the browser, below:
https://ibb.co/r5G3fSn
Regards, Szabi – CodeRevolution.