Hello @DimitarStanev,
I can’t reproduce this issue on my end.
I was just about to give up, but then I noticed something interesting in your screenshot:
It looks like it is either Windows and / or your web browser that is blocking the image.
If you’re still running into this issue, try checking the box and you’ll probably see the image.
If that works you may want to figure out how to disable this overly protective security feature.
I hope this helps.