Fenrir errors

[Linux for blind general discussion]

I've attached the errors I get when I try to run Fenrir without installing it.
All dependencies are installed and I hear no sound or speech. Does
this file suggest why?
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play FAIL formats: no handler for file extension `opus'
Process Process-4:
Traceback (most recent call last):
  File "/usr/lib/python3.5/multiprocessing/process.py", line 249, in _bootstrap
    self.run()
  File "/usr/lib/python3.5/multiprocessing/process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "/home/amanda/Downloads/fenrir/src/fenrir/core/eventManager.py", line 140, in simpleEventWorkerThread
    Data = function(self._mainLoopRunning, args)
  File "/home/amanda/Downloads/fenrir/src/fenrir/inputDriver/evdevDriver.py", line 87, in inputWatchdog
    r, w, x = select(deviceFd, [], [], 2)
KeyboardInterrupt
Process Process-5:
Traceback (most recent call last):
  File "/usr/lib/python3.5/multiprocessing/process.py", line 249, in _bootstrap
    self.run()
  File "/usr/lib/python3.5/multiprocessing/process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "/home/amanda/Downloads/fenrir/src/fenrir/core/eventManager.py", line 127, in customEventWorkerThread
    function(self._mainLoopRunning, eventQueue)
  File "/home/amanda/Downloads/fenrir/src/fenrir/screenDriver/vcsaDriver.py", line 120, in updateWatchdog
    vcsaDevices = glob.glob('/dev/vcsa*')
  File "/usr/lib/python3.5/glob.py", line 20, in glob
    return list(iglob(pathname, recursive=recursive))
  File "/usr/lib/python3.5/glob.py", line 71, in _iglob
    for name in glob_in_dir(dirname, basename):
  File "/usr/lib/python3.5/glob.py", line 85, in glob1
    names = os.listdir(dirname)
KeyboardInterrupt
Process Process-3:
Traceback (most recent call last):
  File "/usr/lib/python3.5/multiprocessing/process.py", line 249, in _bootstrap
    self.run()
  File "/usr/lib/python3.5/multiprocessing/process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "/home/amanda/Downloads/fenrir/src/fenrir/core/eventManager.py", line 127, in customEventWorkerThread
    function(self._mainLoopRunning, eventQueue)
  File "/home/amanda/Downloads/fenrir/src/fenrir/inputDriver/evdevDriver.py", line 65, in plugInputDeviceWatchdogUdev
    devices = monitor.poll(2)
  File "/usr/lib/python3/dist-packages/pyudev/monitor.py", line 340, in poll
    rlist, _, _ = select.select([self], [], [], timeout)
KeyboardInterrupt
play FAIL formats: no handler for file extension `opus'