Original Images Popup Not Working

Hi, Good morning.

I've installed easy blog recently on my website and start using it to create a couple of posts. However I found that when I add a image block with an external link image and select the option to show the original image on a popup window, this feature doesnt work. I have to say the Im loading the images from Imgur as I don't want to fill my hosting with images. Can this be the problem? Maybe this option only works with local images?

Here are some links of my posts:
https://foxy.com.co/blog
https://foxy.com.co/blog/correos-corporativos-foxy
https://foxy.com.co/blog/activa-tu-token-de-instagram

Thanks for your time