Link crash

Build version: 1.7.6
Build date: 1981-01-01 01:01:02
Current date: 2021-12-08 12:21:00
Device: Samsung SM-G570Y
OS version: Android 8.0.0 (SDK 26)

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$1.onSuccess(UpdateManager.java:77)
    at com.google.android.play.core.tasks.e.run(Unknown Source:27)
    at android.os.Handler.handleCallback(Handler.java:789)
    at android.os.Handler.dispatchMessage(Handler.java:98)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6942)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

User actions:
2021-12-08 12:19:23: SplashScreen created
2021-12-08 12:19:23: SplashScreen resumed
2021-12-08 12:19:24: SplashScreen paused
2021-12-08 12:19:25: HomeScreen created
2021-12-08 12:19:25: HomeScreen resumed
2021-12-08 12:19:26: SplashScreen destroyed
2021-12-08 12:19:26: HomeScreen paused
2021-12-08 12:19:28: HomeScreen resumed
2021-12-08 12:19:32: HomeScreen paused
2021-12-08 12:19:32: ChatScreen created
2021-12-08 12:19:33: ChatScreen resumed
2021-12-08 12:19:37: ChatScreen paused
2021-12-08 12:19:37: HomeScreen resumed
2021-12-08 12:19:38: ChatScreen destroyed
2021-12-08 12:19:40: HomeScreen paused
2021-12-08 12:20:11: HomeScreen resumed
2021-12-08 12:20:12: HomeScreen paused
2021-12-08 12:20:12: HomeScreen destroyed
2021-12-08 12:20:57: SplashScreen created
2021-12-08 12:20:57: SplashScreen resumed
2021-12-08 12:20:58: SplashScreen paused
2021-12-08 12:20:58: HomeScreen created
2021-12-08 12:20:58: HomeScreen resumed
2021-12-08 12:20:59: SplashScreen destroyed