MySQL Backup with innobackupex error: Unrecognized character \x01; marked by <-- HERE after <-- HERE near column 1 at - line 1374
should be fixed in version 2.4.7 and version 2.3.8 https://bugs.launchpad.net/percona-xtrabackup/+bug/1651978, if you can still reproduce using the latest version please update the bug report