Link crash

Build version: 1.7.1
Build date: 1981-01-01 01:01:02
Current date: 2021-10-08 11:08:50
Device: OPPO CPH2059
OS version: Android 11 (SDK 30)

Stack trace:
java.lang.RuntimeException: Error receiving broadcast Intent { act=com.google.android.play.core.install.ACTION_INSTALL_STATUS flg=0x40080010 pkg=com.civix.link (has extras) } in com.google.android.play.core.listener.a@79c46c5
    at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$getRunnable$0$LoadedApk$ReceiverDispatcher$Args(LoadedApk.java:1723)
    at android.app.-$$Lambda$LoadedApk$ReceiverDispatcher$Args$_BumDX2UKsnxLVrE6UJsJZkotuA.run(Unknown Source:2)
    at android.os.Handler.handleCallback(Handler.java:938)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:263)
    at android.app.ActivityThread.main(ActivityThread.java:8246)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:612)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1006)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window android.app.Activity.getWindow()' on a null object reference
    at com.sanojpunchihewa.updatemanager.UpdateManager.popupSnackbarForCompleteUpdate(UpdateManager.java:191)
    at com.sanojpunchihewa.updatemanager.UpdateManager.access$300(UpdateManager.java:26)
    at com.sanojpunchihewa.updatemanager.UpdateManager$2.onStateUpdate(UpdateManager.java:131)
    at com.sanojpunchihewa.updatemanager.UpdateManager$2.onStateUpdate(UpdateManager.java:117)
    at com.google.android.play.core.listener.b.a(Unknown Source:24)
    at com.google.android.play.core.appupdate.a.a(Unknown Source:182)
    at com.google.android.play.core.listener.a.onReceive(Unknown Source:2)
    at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$getRunnable$0$LoadedApk$ReceiverDispatcher$Args(LoadedApk.java:1688)
    ... 8 more

User actions:
2021-10-08 11:08:00: SplashScreen created
2021-10-08 11:08:01: SplashScreen resumed
2021-10-08 11:08:02: SplashScreen paused
2021-10-08 11:08:02: HomeScreen created
2021-10-08 11:08:02: HomeScreen resumed
2021-10-08 11:08:02: HomeScreen paused
2021-10-08 11:08:04: SplashScreen destroyed
2021-10-08 11:08:20: HomeScreen resumed
2021-10-08 11:08:28: HomeScreen paused
2021-10-08 11:08:29: HomeScreen destroyed
2021-10-08 11:08:31: SplashScreen created
2021-10-08 11:08:31: SplashScreen resumed
2021-10-08 11:08:32: SplashScreen paused
2021-10-08 11:08:32: HomeScreen created
2021-10-08 11:08:32: HomeScreen resumed
2021-10-08 11:08:32: HomeScreen paused
2021-10-08 11:08:33: HomeScreen resumed
2021-10-08 11:08:33: SplashScreen destroyed