Handson Chanllenge: Create a Bulk Apex Trigger

Eventhough the below works for any insert or update to opportunity and writes to Task I am getting the following:  Challenge not yet complete in My Trailhead Playground 1 We created an opportunity and expected it to have an associated task, but it didn’t.  Make sure your trigger inserts the task into the database.  trigger ClosedOpportunityTrigger on Opportunity (after insert , after update) {     List<Task> taskList = new List<Task>();     for( Opportunity o : Trigger.New){         if(o.StageName == 'Closed Won'){             taskList.add(new Task(Subject = 'Follow Up Test Task', WhatId = o.Id));         }     }     if (taskList.size() > 0){         insert taskList;} }