Error in Linux client Backup when filename contains \ (Backslash)

I am backing up a Raspberry Pi client. One path is
However, in Linux “dhcpcd-wlan0-Schaefer\” is a filename and not a directory. Looks like Urbackup interprets this filename as a windows directory and denies Backup of the file with the error message “HT: Error getting free space for path …”.
Probably a parse problem when convertig client - directories and files into backup - files and directories.

What OS is you server running on? (and what version?)

Linux version 4.9.0-4-amd64 ( (gcc version 6.3.0 20170516 (Debian 6.3.0-18) ) #1 SMP Debian 4.9.65-3+deb9u1 (2017-12-23)

I meant the UrBackup Server version

UrBackup 2.0.32