Hi Dusabrive,
Well I haven't heard about this error before, so what I did was a little googling around checking out some another forums to see if other people are encountering the same? I have spotted some thread where users are talking about Error in retrieving information from the server
i.e Error (rpc:s-7:AEC-0) and the best possible solution i have found is, try to get inside the settings>application>play store>clear data and cache (which I guess @scott has already mentioned you). So I am going to suggest something different
Head over to the Accounts and Sync >Google >Remove account, reboot your device and then again head over to the settings>accounts>google>log in.
See if that works out for you ??
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