Unhandled error in Deferred

[mfnalex]

After a clean install on debian 9, I get this:

Unhandled error in Deferred:
Unhandled Error
Traceback (most recent call last):
  File "/usr/local/share/mark2/mk2/launcher.py", line 506, in run
    f = user_client.UserClientFactory(self.server_name, self.shared_path)
  File "/usr/local/share/mark2/mk2/user_client.py", line 464, in __init__
    t.start(self.config.get_interval('users'))
  File "/usr/local/lib/python2.7/dist-packages/twisted/internet/task.py", line 173, in start
    self()
  File "/usr/local/lib/python2.7/dist-packages/twisted/internet/task.py", line 218, in __call__
    d = defer.maybeDeferred(self.f, *self.a, **self.kw)
--- <exception caught here> ---
  File "/usr/local/lib/python2.7/dist-packages/twisted/internet/defer.py", line 137, in maybeDeferred
    result = f(*args, **kw)
  File "/usr/local/share/mark2/mk2/user_client.py", line 510, in update_users
    self.system_users.update_users()
  File "/usr/local/share/mark2/mk2/user_client.py", line 378, in update_users
    for u in psutil.get_users():
exceptions.AttributeError: 'module' object has no attribute 'get_users'

EDIT: It is working in debian 8.

[Column01]

I know this is super old, this is due to a dependency issue when installing the modules for mark2. At some point, psutil was updated and changed this function call to psutil.users().

Please update to the latest mark2 following the install guide (basically a full reinstall) and this should go away