user tasks

Unable to execute a User Task - Getting error

Hello Community

I am trying to execute a User task using the below code.

Map m = new HashMap<>();
//m.put('name','Test');
//m.put('email','Test@vodafone.qa');
//m.put('phone',"14-2");
//m.put('address','Yes');

long userTaskInstanceId = 100016
apiAccessor.processAPI.executeUserTask(userTaskInstanceId, m)

return "done";

But i am getting the below error

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