How To Fix MeMu Play Error Failed to install the app. Please Switch to a 64-bit Android Version

How about "switch to the higher version Android version" ? already install the "Highest" version but still cant install. On this case I try to install pubgm Lite

I have memu play latest version 7.6.6 ..but it has only android 7.1(recommended version) option ..no other android version available...what should I do to download android version 7.1(64bit)? There is no options for it.