Not a server Problem it happened with me many times and only happens with the members from SFT community post. I think you all are using a similar type of markdown to putting source which is wrong. But I already guided them and some fixed too.

Markdown for putting a source correctly.

And lastly this url :- https://pixabay.com/images/search/ruble/

Which you provided is not correct also it is not redirecting to the image downloading page, it is redirect to your search results page.