There is a consistent pattern to the missing files in your album - in every case, the URL of the missing file contains é. For some reason, your server does not like diacriticals. You will need to talk to your web host about this.
It appears that your server won't accept diacritical characters in folder names. You can work around this.
For the raw folder name, use a simple name, with no diacriticals, like Journee de la femme. But then enter a title for the folder, with the correct spelling, Journée de la femme. The title will be shown in the album.