There are 2 solutions for users who are facing this problem when they want to install or download Betternet.
First Solution -> Removing Junk Files with Cleanmaster :
- Install Cleanmaster
- Uninstall Betternet (if exists)
- Run Cleanmaster, Search for Junk Files and clean them. ( Do not forget to unchecked important files that are detected as junk files by Cleanmaster)
Second Solution -> Using Betternet APK
You could download the direct APK file and install it on your device.
Here is the link: Betternet APK