Error connecting to server

Go to your setup setting and check your wifi setup might have change because it not storing the setting might have a problem with the tablet would replace if under warranty

Try rebooting your ipad and see if the problem still persists, if not then try go into settings -> WiFi -> then click your network your network and click forget Network, then try to connect to the network again. Or if you use your sim's network then turn off then turn on the mobile network option in the settings menu.
If it still doesnt work, then something is wrong with your WiFi or mobile network. Best thing would be to lodge a complaint or wait for a few days as these things usually sort themselves out on their own. Hope I helped :) !

i had the same problem and my system wont work and wen i turn on my tablet it says. tablet useless now

Try going Settings>Accounts>Google> Tap your account> Three dots in the upper right (or press menu button) "Remove Account" ... then read your account .. then if you want, clear Play store cache and data and try it

We had the same problem with this exact tablet: fortunately, I found a video that showed how to correct this error - -
http://www.youtube.com/watch?v=uv8d-nl04qI

Basically, you enter Settings;
Delete your Google account information;
Enter Apps, go to All Apps, and delete data in the following THREE places:
Download Manager
Google Play Store
Google System Services

Then, you re-enter your Google account information.
It worked for us, I hope it works for you, too.

Try to delete the app and re-install it. It's saying there was an error when it was installed.

Fixing RPC:S-5:AEC-0 Google Play Store Error

The Google Play / Android Market error retrieving information from server RPC:S-5:AEC-0 error message can be a bit of a pain, the RPC:S-5:AEC-0 error just randomly appeared on my tablet after it upgraded to a newer version of Android. However this is how i managed to fix the RPC:S-5:AEC-0 error with ease.

1. Load the Settings app, click apps, then select "All"
2. Next in the all apps view find the "Google Play Store" and click on it
3. Now click "Clear Cache" (Not Data), then Force Stop.
4. Next in the same app list find "Google Service Framework"
5. Click clear data (Not Cache), then Force Stop
6. Switch off the phone or tablet and turn it back on
7. You should be able to download and update apps from the Google Play store once more.

Enjoy no more RPC:S-5:AEC-0 errors when downloading or updating apps.
Or Simply Go to settings/app.manager/all
Delete data + cache :
Google Play Store
Google Play-services
Google Services Framework
Hangouts
Market-feedback agent (important)
Then delete google-account(data/system/user/0/ fine the accounts.db file and cut and paste it somewhere else)
Restart the phone and then re-add google-account( paste your accounts.db file earlier to it's original location).
p/s~Your device need to be rooted to remove/delete google account without a factory reset.

enjoy and have a good day :)

Go into settings > applications. Locate your application for downloading books and clear the cache. Force stop the app then re-launch and try again.

use the browser (google)
type in appslib
click download appalib ( new version ?)
reinstall appslib
i found this fixed the problem