Backup using xtrabackup

Hello,

Is the backup using xtrabackup no longer working? I tried to backup MariaDB 10.2 using this method. However, the latest xtrabackup version 8 no longer suppoert steam with tar option. The only option is --steam=xbsteam. My client is CentOS 7 and the server is Windows. I got the following error in the client:

Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Creating shadowcopy of “mariadbbackup” failed.
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “root” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “bin” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “daemon” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “adm” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “lp” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “sync” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “shutdown” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “halt” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “mail” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “operator” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “games” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “ftp” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “nobody” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “avahi-autoipd” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “systemd-bus-proxy” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “systemd-network” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “dbus” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “polkitd” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “tss” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “postfix” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “sshd” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for user “mysql” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “root” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “bin” not found

Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “daemon” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “sys” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “adm” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “tty” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “disk” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “lp” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “mem” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “kmem” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “cdrom” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “mail” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “man” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “dialout” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “floppy” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “games” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “tape” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “video” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “ftp” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “lock” not found
Apr 9 12:09:34 [localhost] urbackupclientbackend: ERROR: Token id for group “audio” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “nobody” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “users” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “utmp” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “utempter” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “ssh_keys” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “avahi-autoipd” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “input” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “systemd-journal” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “systemd-bus-proxy” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “systemd-network” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “dbus” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “polkitd” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “dip” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “tss” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “postdrop” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “postfix” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “sshd” not found
Apr 9 12:09:35 [localhost] urbackupclientbackend: ERROR: Token id for group “mysql” not found
Apr 9 12:09:36 [localhost] urbackupclientbackend: ERROR: TAR checksum wrong. Checksum=0 checksum1=-9046 checksum2=34730
Apr 9 12:09:36 [localhost] urbackupclientbackend: ERROR: Current tar fn: XBSTCK01

and the following error from server:

04/09/20 11:00 DEBUG HT: Copying file: “C:\urbackup\staging-restore\200409-1100\urbackup_backup_scripts\mariadbxtrabackup” (id=5)
04/09/20 11:00 DEBUG HT: Renaming file to “C:\urbackup\staging-restore\200409-1100\urbackup_backup_scripts\mariadbxtrabackup”
04/09/20 11:00 INFO Waiting for file hashing and copying threads…
04/09/20 11:00 INFO Waiting for metadata download stream to finish
04/09/20 11:00 ERROR Error saving metadata. Could not open output file at “C:\urbackup\staging-restore\200409-1100.hashes\urbackup_backup_scripts\mariadbxtrabackup.dir_metadata”
04/09/20 11:00 INFO Writing new file list…
04/09/20 11:00 INFO All metadata was present
04/09/20 11:00 DEBUG Syncing file system…
04/09/20 11:00 INFO Transferred 993 bytes - Average speed: 5.352 KBit/s
04/09/20 11:00 DEBUG Script does not exist urbackup\post_full_filebackup.bat
04/09/20 11:00 INFO Time taken for backing up client staging-restore: 12s
04/09/20 11:00 ERROR Backup failed

Is there any fix?
Thanks

It’s the same for me. Who can tell what the problem is?
OS Debian 10.