Re: Trying to download apps and its saying rps:s-7:aec-7
Welcome to Android Central! Which device? Does it happen on both wi-fi and mobile data? Have you tried other wi-fi networks? Do all of your other Google apps work, like Gmail?
Try going to Settings>Apps>All, select Google Play Store, and Force Stop, then Clear Cache/Clear Data. Do the same for Download Manager.
If that doesn't work, then go to Settings>Accounts-Google, and remove your Google account. Now add it back again, and try again.