Link crash

Build version: 1.7.9
Build date: 1981-01-01 01:01:02
Current date: 2022-01-07 19:27:02
Device: Samsung SM-G610F
OS version: Android 8.1.0 (SDK 27)

Stack trace:
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Activity.startIntentSenderForResult(android.content.IntentSender, int, android.content.Intent, int, int, int, android.os.Bundle)' on a null object reference
    at com.google.android.play.core.appupdate.d.startIntentSenderForResult(Unknown Source:9)
    at com.google.android.play.core.appupdate.e.startUpdateFlowForResult(Unknown Source:23)
    at com.google.android.play.core.appupdate.e.startUpdateFlowForResult(Unknown Source:9)
    at com.sanojpunchihewa.updatemanager.UpdateManager.startUpdate(UpdateManager.java:95)
    at com.sanojpunchihewa.updatemanager.UpdateManager.access$100(UpdateManager.java:26)
    at com.sanojpunchihewa.updatemanager.UpdateManager$1.onSuccess(UpdateManager.java:84)
    at com.sanojpunchihewa.updatemanager.UpdateManager$1.onSuccess(UpdateManager.java:77)
    at com.google.android.play.core.tasks.e.run(Unknown Source:27)
    at android.os.Handler.handleCallback(Handler.java:790)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:7000)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)

User actions:
2022-01-07 19:22:02: SplashScreen created
2022-01-07 19:22:02: SplashScreen resumed
2022-01-07 19:22:03: SplashScreen paused
2022-01-07 19:22:04: HomeScreen created
2022-01-07 19:22:04: HomeScreen resumed
2022-01-07 19:22:04: HomeScreen paused
2022-01-07 19:22:05: HomeScreen resumed
2022-01-07 19:22:05: SplashScreen destroyed
2022-01-07 19:22:05: HomeScreen paused
2022-01-07 19:22:09: HomeScreen resumed
2022-01-07 19:22:10: HomeScreen paused
2022-01-07 19:22:10: ChatScreen created
2022-01-07 19:22:10: ChatScreen resumed
2022-01-07 19:22:37: ChatScreen paused
2022-01-07 19:22:37: HomeScreen resumed
2022-01-07 19:22:38: ChatScreen destroyed
2022-01-07 19:22:43: HomeScreen paused
2022-01-07 19:22:44: HomeScreen destroyed
2022-01-07 19:26:59: SplashScreen created
2022-01-07 19:26:59: SplashScreen resumed
2022-01-07 19:27:00: SplashScreen paused
2022-01-07 19:27:00: HomeScreen created
2022-01-07 19:27:00: HomeScreen resumed
2022-01-07 19:27:00: HomeScreen paused
2022-01-07 19:27:00: HomeScreen resumed
2022-01-07 19:27:01: SplashScreen destroyed