Invalid APK file

After following in adetailed manner the gear vr develpment guide on UE documentation, i get this error when running bat after compiling:

Installing existing application. Failures here indicate a problem with the device (connection or storage permissions) and are fatal.

C:\Windows\system32>C:\NVPACK\android-sdk-windows\platform-tools\adb.exe install ****_VR-armv7-es2.apk
Invalid APK file: ****_VR-armv7-es2.apk

Has anyone had this issue? driving me crazy here!
Thanks in advance.
F.

I get the same error. Did you find a solution?
Thanks & Regards

Same Problem here ! Can’t find any Solution !

I have same issue too! Please help devs!