My husband is having the exact same problem with his Ellipsis 7 tablet that MANY of you have posted about: not enough app space memory. Meanwhile, I have the same tablet, purchased at the same time and place with NO PROBLEMS.
After help from ANTHONY (amazing assistance) thru Verizon Tech Support, we found the difference in our tablets and a SOLUTION.
CHECK YOUR TABLET'S SOFTWARE VERSION by:
1. going to Settings,
2. clicking on About Tablet, and
3. scrolling down to Software Version.
You want it to say MV7A_31D25_422A (my tablet) and NOT MV7A_31D26_422 (my husband's).
My husband's tablet is going back for his software to be reconfigured to match mine. I understand your frustration and truly hope this solves your problem as well.