ninja did'nt run and throw some errors (ninja: build stopped: subcommand failed.)

[lucoda]

Hello dear opeanRazer Community,

here's the error code from the Terminal:

$ sudo ninja run
[0/1] Regenerating build files.
The Meson build system
Version: 0.45.1
Source dir: /opt/git/razerCommander
Build dir: /opt/git/razerCommander/builddir
Build type: native build
Project name: razercommander
Build machine cpu family: x86_64
Build machine cpu: x86_64
Configuring org.gabmus.razercommander.desktop using configuration
Configuring org.gabmus.razercommander.service using configuration
Found pkg-config: /usr/bin/pkg-config (0.29.1)
Native dependency glib-2.0 found: YES 2.56.3
Program glib-compile-schemas found: YES (/usr/bin/glib-compile-schemas)
Configuring razercommander using configuration
Program scripts/meson_post_install.py found: YES (/usr/bin/env python3 /opt/git/razerCommander/scripts/meson_post_install.py)
Build targets in project: 3
Found ninja-1.8.2 at /usr/bin/ninja
[0/1] Running external command run.
Traceback (most recent call last):
  File "/opt/git/razerCommander/builddir/bin/razercommander", line 50, in <module>
    from razercommander import __main__
  File "/opt/git/razerCommander/razercommander/__main__.py", line 47, in <module>
    check_plugdev()
  File "/opt/git/razerCommander/razercommander/__main__.py", line 28, in check_plugdev
    if os.path.isfile('{}/flatpak-info'.format(os.environ['XDG_RUNTIME_DIR'])):
  File "/usr/lib/python3.6/os.py", line 669, in __getitem__
    raise KeyError(key) from None
KeyError: 'XDG_RUNTIME_DIR'
FAILED: meson-run 
/usr/bin/python3 /usr/bin/meson --internal commandrunner /opt/git/razerCommander /opt/git/razerCommander/builddir bin /usr/bin/python3 /usr/bin/meson /opt/git/razerCommander/builddir/bin/razercommander
ninja: build stopped: subcommand failed.

Do you have any ideeas how to Fix it?

Thank you in Future

Best regards
Lucoda