As seen in the link the thumbnails stay grey/black instead of showing the preview.
When launching the page locally all works fine, also before when hosted at home on my Synology-NAS (also running Apache)
Assuming this might be some permissions-issue with folders in Apache 2.4. From the past I remember many issues arising from wrong permissions.
On rare occassions thumbnails show up correctly, but only when using the above direct link.
When choosing "Bilder" on the left it never works. Makes issue more weird for me..
Yes, I know this frame-thing isn`t the best solution and my whole work is pretty poor - this was best I was able to do years ago.
Will be changed sometime - but not now as I am doing webstuff only occasionally and lack of knowledge and practice.
Yes, I too saw the real thumbnails when following my link right now.
Second try gives black rectangles again.
From the navigation at the left it always gives black rectangels - although it is opening the same link.
Was working when hosted at home with Apache, now at Amazon AWS with new Apache-installation I guess this is a permission thing.