Help Folder Mount Inefficient Space available {False} topic

I have an LG Optimus L90 and I want to download Folder Mount to move my big games, the problem is that Folder Mount wont install. I have 1.83GB available, and Folder Mount is a small app so i dont understand. I can download other apps but i cant download Folder Mount.
I am rooted (used Towelroot) and i used root checker to check. Please help. Thanks