Thanks to OneOreTwo in Comments.
Go to this post: How to fix Teclast X98 Air II Google Play Store crashed issue
No need for dealing with any rooting. The solution is so simple, it’s a bit amazing no one tried it on their own.
Keep it in mind for other tablets — from Teclast and others!
Update: See also:
Teclast X98 Air 3G: Three New Videos
Previously here:
Hi Mike, I just got a new X98 Air 3g. I tried updating the play store, but it didn’t work. and not just the play store but all google apps don’t work. Gmail was working until I updated it. Any advice please?
I don’t own it and can’t give advice about it. Try Commenting at the source and asking:
http://blog.geekbuying.com/index.php/2014/11/20/how-to-fix-teclast-x98-air-ii-google-play-store-crashed-issue/
Doesn’t work. I tried it before. As soon as you download an app via Play store it crashes. Rooting is only solution