Im also having trouble where after extracting the .apk from the 7z file on my PC, and moving it back to my android phone to install, it gets about 90% complete then aborts.Try to install via USB
What do you mean by install via USB?
Also, why was the APK even put into a 7z file? Cant natively open it on the android device the apk was for, and the file compression went from 603mb to 565mb, which isnt significant.