does not work on Devuan Chimaera

[maccagnan]

I just installed the debian package and all its dependencies.
Launched multiboot and got this errormessage:
$ multibootusb
/usr/bin/multibootusb:194: SyntaxWarning: "is not" with a literal. Did you mean "!="?
if uninstall is True and config.usb_disk is not '':
/usr/bin/multibootusb:196: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif uninstall is True and config.usb_disk is '':
/usr/bin/multibootusb:200: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif config.image_path is '' and config.usb_disk is '':
/usr/bin/multibootusb:200: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif config.image_path is '' and config.usb_disk is '':
/usr/bin/multibootusb:203: SyntaxWarning: "is not" with a literal. Did you mean "!="?
elif config.cli_syslinux is True and config.usb_disk is not '':
/usr/bin/multibootusb:205: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif config.image_path is '' or config.usb_disk is '':
/usr/bin/multibootusb:205: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif config.image_path is '' or config.usb_disk is '':
Using python version 3.9.2 (default, Feb 28 2021, 17:03:44)
[GCC 10.2.1 20210110] on platform Linux-5.10.0-19-amd64-x86_64-with-glibc2.31
Traceback (most recent call last):
File "/usr/bin/multibootusb", line 187, in
if config.debug is True:
NameError: name 'config' is not defined