Sorry, I have some problems. Some of my images of the albums are shown as a blank square.
I found out, that the images with the blank square have another URL. The images of the servers https://fbcdn-sphotos-***.akamaihd.net/...... are correct, the images of the server https://scontent-****.fbcdn.net/......... are shown as a blank square. All of them are within the same album.
I don't know if the images are uploaded in different ways (app? desktop?). Maybe this is the reason that the images are stored on different servers?
Thank you for your help,