The problem is with the Google Play Store app. Try resetting the tablet to factory and do not sign into the Google Play Store. Any app that you need you can get from alternative app stores that you can download or you can go on the internet and search for the specific app by typing it in this way if I'm looking for let's say Yahoo I would search "Yahoo APK". I have managed to download an alternative app store to Google Play and I get all my apps from them. I also root at my tablet using Kingo root and I installed titanium backup to delete all the junk off of it all the kids stuff including parent mode it is now an adult regular tablet and runs great.