Images not showing up

Please take a look here for example:

And he last three links here aren’t being expanded either:

Originally, the articles didn’t have images. Then I added them, but they still aren’t showing up. Is there a way tell Discourse to delete the cache of that URL and to re-scrape a page somehow? Especially its own generated page?

Just for testing, I will add them here:

Have you tried clicking the wrench and “rebuild html”?