Inkcut not working on linux

All installed apparently properly. Cutter is recognized, but when I try to send something I get this

Traceback (most recent call last):
  File "/home/gussy/.local/lib/python3.6/site-packages/twisted/internet/defer.py", line 1815, in _cancellableInlineCallbacks
    _inlineCallbacks(None, gen, status)
  File "/home/gussy/.local/lib/python3.6/site-packages/twisted/internet/defer.py", line 1660, in _inlineCallbacks
    result = current_context.run(gen.send, result)
  File "/home/gussy/.local/lib/python3.6/site-packages/twisted/internet/defer.py", line 62, in run
    return f(*args, **kwargs)
  File "/home/gussy/.local/lib/python3.6/site-packages/inkcut/device/plugin.py", line 576, in connect
    yield defer.maybeDeferred(self.connection.connect)
--- <exception caught here> ---
  File "/home/gussy/.local/lib/python3.6/site-packages/twisted/internet/defer.py", line 62, in run
    return f(*args, **kwargs)
  File "/home/gussy/.local/lib/python3.6/site-packages/inkcut/device/plugin.py", line 749, in submit
    yield defer.maybeDeferred(self.connect)
  File "/home/gussy/.local/lib/python3.6/site-packages/twisted/internet/defer.py", line 62, in run
    return f(*args, **kwargs)
  File "/home/gussy/.local/lib/python3.6/site-packages/inkcut/device/plugin.py", line 576, in connect
    yield defer.maybeDeferred(self.connection.connect)
  File "/home/gussy/.local/lib/python3.6/site-packages/twisted/internet/defer.py", line 190, in maybeDeferred
    result = f(*args, **kwargs)
  File "/home/gussy/.local/lib/python3.6/site-packages/inkcut/device/transports/serialport/plugin.py", line 95, in connect
    rtscts=config.rtscts
  File "/home/gussy/.local/lib/python3.6/site-packages/twisted/internet/_posixserialport.py", line 48, in __init__
    rtscts=rtscts,
  File "/home/gussy/.local/lib/python3.6/site-packages/serial/serialutil.py", line 244, in __init__
    self.open()
  File "/home/gussy/.local/lib/python3.6/site-packages/serial/serialposix.py", line 325, in open
    raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 13] could not open port /dev/ttyACM0: [Errno 13] Permission denied: '/dev/ttyACM0'

Thank you. that worked. The only thing that does not work is the inkscape extension. it does not open inkcut
this i what I get when I try to cut from the inkcut extension

inkcut_cut.py:27: DeprecationWarning: inkex.localize was moved to inkex.localization.localize
  inkex.localize()
inkcut_cut.py:73: DeprecationWarning: Effect.affect is now `Effect.run()`. The `output` argument has changed.
  effect.affect()
inkcut_cut.py:44: DeprecationWarning: Effect.selected is now a dict in the svg. Use `self.svg.selected`.
  nodes = self.selected
inkcut_cut.py:50: DeprecationWarning: Effect.selected is now a dict in the svg. Use `self.svg.selected`.
  if contains_text(self.selected.values()):
inkcut_cut.py:68: DeprecationWarning: inkex.etree was removed, use "from lxml import etree"
  p.stdin.write(inkex.etree.tostring(document))
/usr/lib64/python3.6/subprocess.py:786: ResourceWarning: subprocess 6978 is still running
  ResourceWarning, source=self)