Crash when trying to DL the expansion file on a beta release

[ghost]

I started the app and got the message "Downloading assets..." after which the app crashed immeadiately.

This is the error message from google play's crash page:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sound.moodil/com.flyingsoftgames.xapkreader.XAPKDownloaderActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window android.app.Activity.getWindow()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2356)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2418)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5289)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window android.app.Activity.getWindow()' on a null object reference
at com.flyingsoftgames.xapkreader.XAPKDownloaderActivity.onCreate(XAPKDownloaderActivity.java:75)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2309)
... 10 more

[agamemnus]

Are you using 5.3.1? A beta version should not initiate the downloader. If you are using 5, it is more complicated to use (check the giant issue megathread), so I suggest 5.3.1...