no mistake. The images are not yet updated to the newest version. My repo was merged with the official image of UrBackup, therefore I dont update it that regulary.
Right now the official docker image is also still on version 2.4.11: github.com/uroni/urbackup-server-docker-new
I'll test the new version in the next days and if it works I'll update my repo.
Will be staying tuned for news...