CentOS7.6

Traceback (most recent call last):
  File "/usr/bin/docker-compose", line 6, in <module>
    from compose.cli.main import main
  File "/usr/lib/python2.7/site-packages/compose/cli/main.py", line 17, in <module>
    import docker
  File "/usr/lib/python2.7/site-packages/docker/__init__.py", line 2, in <module>
    from .api import APIClient
  File "/usr/lib/python2.7/site-packages/docker/api/__init__.py", line 2, in <module>
    from .client import APIClient
  File "/usr/lib/python2.7/site-packages/docker/api/client.py", line 10, in <module>
    from .build import BuildApiMixin
  File "/usr/lib/python2.7/site-packages/docker/api/build.py", line 6, in <module>
    from .. import auth
  File "/usr/lib/python2.7/site-packages/docker/auth.py", line 9, in <module>
    from .utils import config
  File "/usr/lib/python2.7/site-packages/docker/utils/__init__.py", line 3, in <module>
    from .decorators import check_resource, minimum_version, update_headers
  File "/usr/lib/python2.7/site-packages/docker/utils/decorators.py", line 4, in <module>
    from . import utils
  File "/usr/lib/python2.7/site-packages/docker/utils/utils.py", line 13, in <module>
    from .. import tls
  File "/usr/lib/python2.7/site-packages/docker/tls.py", line 5, in <module>
    from .transport import SSLHTTPAdapter
  File "/usr/lib/python2.7/site-packages/docker/transport/__init__.py", line 11, in <module>
    from .sshconn import SSHHTTPAdapter
  File "/usr/lib/python2.7/site-packages/docker/transport/sshconn.py", line 1, in <module>
    import paramiko
  File "/usr/lib/python2.7/site-packages/paramiko/__init__.py", line 22, in <module>
    from paramiko.transport import SecurityOptions, Transport
  File "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 129, in <module>
    class Transport(threading.Thread, ClosingContextManager):
  File "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 190, in Transport
    if KexCurve25519.is_available():
  File "/usr/lib/python2.7/site-packages/paramiko/kex_curve25519.py", line 30, in is_available
    X25519PrivateKey.generate()
  File "/usr/lib64/python2.7/site-packages/cryptography/hazmat/primitives/asymmetric/x25519.py", line 39, in generate
    if not backend.x25519_supported():
AttributeError: 'Backend' object has no attribute 'x25519_supported'
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 120, in _join_lingering_threads
    for thr in _active_threads:
TypeError: 'NoneType' object is not iterable
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 120, in _join_lingering_threads
    for thr in _active_threads:
TypeError: 'NoneType' object is not iterable