Link crash

Build version: 1.7.6
Build date: 1981-01-01 01:01:02
Current date: 2021-11-18 14:13:51
Device: Vsmart Live
OS version: Android 10 (SDK 29)

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$1.onSuccess(UpdateManager.java:77)
    at com.google.android.play.core.tasks.e.run(Unknown Source:27)
    at android.os.Handler.handleCallback(Handler.java:883)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:214)
    at android.app.ActivityThread.main(ActivityThread.java:7458)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)

User actions:
2021-11-18 12:07:38: SplashScreen created
2021-11-18 12:07:38: SplashScreen resumed
2021-11-18 12:07:39: SplashScreen paused
2021-11-18 12:07:39: HomeScreen created
2021-11-18 12:07:39: HomeScreen resumed
2021-11-18 12:07:39: SplashScreen destroyed
2021-11-18 12:07:40: HomeScreen paused
2021-11-18 12:07:48: HomeScreen resumed
2021-11-18 12:07:51: HomeScreen paused
2021-11-18 12:07:51: ChatScreen created
2021-11-18 12:07:51: ChatScreen resumed
2021-11-18 12:09:06: ChatScreen paused
2021-11-18 12:09:06: HomeScreen resumed
2021-11-18 12:09:07: HomeScreen paused
2021-11-18 12:09:07: ChatScreen destroyed
2021-11-18 12:09:07: HomeScreen destroyed
2021-11-18 14:13:48: SplashScreen created
2021-11-18 14:13:48: SplashScreen resumed
2021-11-18 14:13:49: SplashScreen paused
2021-11-18 14:13:49: HomeScreen created
2021-11-18 14:13:49: HomeScreen resumed
2021-11-18 14:13:50: SplashScreen destroyed