I am trying to pulling nginx nginx_status from observium. But when I run the nginx script I got the following error:

./nginx
<<<nginx>>>

Traceback (most recent call last):
  File "./nginx", line 35, in <module>
    Active = int(params["Reading"]) + int(params["Writing"]) + int(params["Waiting"])
KeyError: 'Reading'

Observium is not generating any graph for NGINX. Other SNMP query on that server is ok and I can view all report.

Thanks
Fakrul