Why am I not able to rate my app on Play Store?

[AC Question]

I have my app on Play Store. I installed it from there and try to rate my app. App successfully redirected me to Play Store. When I submit my rating I got the following error.
"Error while retrieving information from the server RPC:S-9:AEC-9"

How can I fix this error?
I developed my app using Cordova platform (version - 4.0.0). I used Cordova Apprate plugin 1.1.7 for implementing App rate functionality.

 

[the tall guy]

Hi, I don't know but I would imagine rating your own app isn't allowed?? I could be wrong though.