Can't download apps! Help, please!

Kurbis

New member
May 23, 2013
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I have a new Android iview CyberPad. I tried to download apps like Kindle Cloud or tried updates for already installed apps but it doesn't work.


What can I do to update or download apps or updates?

It says:

Update for "Kindle" could not be downloaded due to an error. (921)

or:

Update for Kindle could not be downloaded due to an error. (error retrieving information from server [RPC:S-5:AEC-0]]​

I want to add that I deleted my gmail account and added it again and emptied the cache and data of Google Playstore but it helped only for one update. 8 updates e.g. Google maps and others that are waiting for me but I can't update them or new apps due to this problem. This is very frustrating. I am trying to solve the problem since several days to no avail.

Please help and thanks in advance for any help and advice you can give to me.