java.lang.NullPointerException

[manwooo]

How to solve this error ? this error is not always,..

manifest.xml include permission..

i'm using below version.
implementation 'gun0912.ted:tedpermission:2.2.3'

bleow is stack trace...

java.lang.RuntimeException: Unable to start activity ComponentInfo{kr.co.nexict.next/com.gun0912.tedpermission.TedPermissionActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File android.app.Activity.getFilesDir()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4035)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4201)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2438)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:226)
at android.os.Looper.loop(Looper.java:313)
at android.app.ActivityThread.main(ActivityThread.java:8663)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:567)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1135)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File android.app.Activity.getFilesDir()' on a null object reference
at i.a.a.c.j0.e.a.a(:103)
at com.gun0912.tedpermission.TedPermissionActivity.B(Unknown Source:45)
at com.gun0912.tedpermission.TedPermissionActivity.z(Unknown Source:48)
at com.gun0912.tedpermission.TedPermissionActivity.onCreate(:7)
at android.app.Activity.performCreate(Activity.java:8290)
at android.app.Activity.performCreate(Activity.java:8270)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4009)
... 12 more
java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File android.app.Activity.getFilesDir()' on a null object reference
at i.a.a.c.j0.e.a.a(:103)
at com.gun0912.tedpermission.TedPermissionActivity.B(Unknown Source:45)
at com.gun0912.tedpermission.TedPermissionActivity.z(Unknown Source:48)
at com.gun0912.tedpermission.TedPermissionActivity.onCreate(:7)
at android.app.Activity.performCreate(Activity.java:8290)
at android.app.Activity.performCreate(Activity.java:8270)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4009)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4201)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2438)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:226)
at android.os.Looper.loop(Looper.java:313)
at android.app.ActivityThread.main(ActivityThread.java:8663)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:567)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1135)

[ted-prnd]

Do you have problem scenario?