Importing Paramiko library failed

Error in file '/resources/res_ssh_connections.tsv': Importing test library 'SSHLibrary' failed: ImportError: Importing Paramiko library failed. Make sure you have Paramiko installed.
Traceback (most recent call last):
File "/opt/tex/lib/sshlibs/SSHLibrary-3.2.1/SSHLibrary/init.py", line 16, in
from .client import SSHClient
File "/opt/tex/lib/sshlibs/SSHLibrary-3.2.1/SSHLibrary/client.py", line 21, in
from .pythonclient import PythonSSHClient as SSHClient
File "/opt/tex/lib/sshlibs/SSHLibrary-3.2.1/SSHLibrary/pythonclient.py", line 23, in
'Importing Paramiko library failed. '

This is the installed library versions
/opt/tex/lib/sshlibs/SSHLibrary-3.2.1
/opt/tex/lib/sshlibs/SSHLibrary-3.2.1/SSHLibrary
/opt/tex/lib/sshlibs/ecdsa-0.13
/opt/tex/lib/sshlibs/paramiko-2.4.2
/opt/tex/lib/sshlibs/pycrypto-2.6.1
/opt/tex/lib/robotframework-selenium2library/robotframework-selenium2library-3.0.0
/opt/tex/lib/python/decorator-3.4.0/site-packages
/opt/tex/lib/selenium2-python/Selenium-3.141.0
/opt/tex/lib/python/wxpython-2.8.12.1/lib/python2.7/site-packages/wx-2.8-gtk2-unicode
/opt/tex/lib/pygtk/gtk-2.0
/opt/tex/lib/python/cryptography-1.9_py2
/opt/tex/lib/python/python-2.7.11-64/lib/python27.zip
/opt/tex/lib/python/python-2.7.11-64/lib/python2.7
/opt/tex/lib/python/python-2.7.11-64/lib/python2.7/plat-linux2
/opt/tex/lib/python/python-2.7.11-64/lib/python2.7/lib-tk
/opt/tex/lib/python/python-2.7.11-64/lib/python2.7/lib-old
/opt/tex/lib/python/python-2.7.11-64/lib/python2.7/lib-dynload
/opt/tex/lib/python/python-2.7.11-64/lib/python2.7/site-packages

Start with the traceback in SSHLibrary/init.py, client.py, and pythonclient.py, then reproduce the import using Paramiko 2.4.2 under Python 2.7.11 and the listed dependencies. A useful outcome would be a confirmed compatibility cause with a reproducible fix or clearly documented supported configuration.