Error code

Google Play RPC-S-7-AEC-0

GOOGLE PLAYRPC-S-7-AEC-0
Android Error Code· An error code shown by Android or the Google Play Store.

What it means

Remote procedure call failure — the Play Store cannot communicate with Google servers.

How to fix it

  1. Check the device date and time are set correctly (incorrect time breaks SSL).
  2. Toggle airplane mode off and on to reset the network connection.
  3. Remove and re-add the Google account (Settings > Accounts > Google > Remove account then re-add).
  4. Clear the cache and data for Google Play Services.

Not affiliated with Google Play. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.