How to create notification channel for PermissionEverywhere.getpermission

Question

I am working on one task where I need to read the data from calendar, as per android documentation, I added

<uses-permission android:name="android.permission.READ_CALENDAR" />

but now when I am using a method

ActivityCompat.checkSelfPermission(this,
                Manifest.permission.READ_CALENDAR)

it is always returning -1, and permission is denial always, After investigation, I found that I have to request permission at run time, and there are multiple permission required to be granted in my framework,

I found that PermissionEverywhere.getpermission, can solve this issue,

but I am getting error "Developer warning for package Failed to post notification on channel "null" see log for more details

I tried adding the notification channel using below method

   private void createNotificationChannelIfNeeded(int id, String title, String message) {
    // Create the NotificationChannel, but only on API 26+ because
    // the NotificationChannel class is new and not in the support library
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        CharSequence name = title;
        String description = message;
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel(title, name, importance);
        channel.setDescription(description);
        // Register the channel with the system; you can't change the importance
        // or other notification behaviors after this
        NotificationManager mNotifyMgr =
                (NotificationManager) getApplicationContext().getSystemService(NOTIFICATION_SERVICE);
        mNotifyMgr.createNotificationChannel(channel);
    }

but still getting the same error. please let me know, how to create channel for Permission everywhere class