You are correct, I get that error message also with albums without web locations.
I have now added some logging, so if you try to add that album again that fails I can see what's happening.
I see still the same in the system console:
Album upload: 0.751s
Total upload: 1.415s
java.io.IOException: Error while adding album. Server reported: java.io.IOException: Image data does not represent an image.
at se.datadosen.jalbum.Notifier.albumAdded(Notifier.java:127)
at se.datadosen.jalbum.Notifier$1.run(Notifier.java:153)
No logging is visible for me.
I use the jAlbum uploader already 10 years to upload albums to my Stratoserver, but I can't remember that I ever had seen this error message, so I guess there is recently someting changed which causes this problem.
Edited by: AndreWolff on 03-Oct-2017 15:35