Check if you are using the latest version of Google Play.
OR
After these steps.
RPC: AEC: 0 bug known as the CPU / RAM / failure / device ID.
This is only possible way you can follow to get rid of this error is
Go to Settings> applications> Play Store> Clear data and Clear cache.
Go to Accounts> Google> Remove Account.
Reboot device.
Again Settings> Account> Google> Log in.