I have freshly installed Urbackup version 2.5.27 built from source on Debian with btrfs . Once the backup has ran I get the following error in the logs.
Creating snapshot of "/home/XXXXX" failed
sh: 1: /usr/local/share/urbackup/btrfs_create_filesystem_snapshot: not found
Creating snapshot of "XXXXX" failed.
the required files appear in the source but don’t appear to be moved to the right place during installation.
I manually copied them and everything is working without errors being reported.