Hello,
Sorry, this also did not help. I had tried before with and without "/". This is not the problem.
Again: Please look at the screenshots! I can't find out where the url is constructed. I think that there is the problem. The paths in configuration are correct. The images in shop frontend are shown. But the images in the popup when editing (adding or changing images) are not shown. And when I have a lot of images and I can see only part of the names of them, it is too hard to find some pics without to see it real.
Thank you for your time to help,
regards,
Karl