Broken Post Images in Feed

Hi, we currently have the free version of flow-flow lite, but we are constantly having issues with some of the posts showing broken images in the feed.

I attempted to fix this by reauthenticating the feed (of which the process also currently gives an error, but I just refresh the page) and also rebuilding the cache (which also seems to stall and I have to refresh the page).

Despite the errors in the backend, it has worked previously to get the images temporarily showing again, but it just keeps happening again and again.

What is a permanent solution for this? Thank you.

The page I need help with: [log in to see the link]