Centos 7 : ImportError: No module named amplify

[selatraxl]

I have problems when restarting amplify-agent services :

runuser[4621]: pam_unix(runuser:session): session opened for user nginx by (uid=0)
amplify-agent[4591]: Starting nginx-amplify-agent: Traceback (most recent call last):
amplify-agent[4591]: File "/usr/bin/nginx-amplify-agent.py", line 21, in <module>
amplify-agent[4591]: import amplify
amplify-agent[4591]: ImportError: No module named amplify
runuser[4621]: pam_unix(runuser:session): session closed for user nginx
amplify-agent[4591]: [FAILED]
systemd[1]: Can't open PID file /var/run/amplify-agent/amplify-agent.pid (yet?) after start: No such file or directory
systemd[1]: Failed to start NGINX Amplify Agent.

I try to reboot the systems, and re-install the Nginx-amplify-agent, but still no luck, i still cannot start the amplify-agent services.

Thank's.