applications – i needed to change icon and tittle for (maas360 apk) and i got this error

i wanted to change icon and title of an app (maas360). i used a tool called (APK Editor Studio) when i unpack it. it gives me this (unpacking error).

I: Using Apktool 2.4.1 on in thread "main" brut.androlib.AndrolibException: zip file is empty at brut.androlib.ApkDecoder.hasResources( at brut.androlib.ApkDecoder.decode( at brut.apktool.Main.cmdDecode( at brut.apktool.Main.main( Caused by: zip file is empty at<init>( at<init>( at at brut.androlib.ApkDecoder.hasResources( ... 3 more Caused by: zip file is empty at Method) at<init>(Unknown Source) at<init>(Unknown Source) at<init>(Unknown Source) at<init>( ... 6 more