Unknown argument type : undefined at Request.callListeners

****node_modules/aws-sdk/lib/request.js:31

        throw err;
        ^                                                        
 Error: Unknown argument type : undefined   at Request.callListeners ~/node_modules/aws-sdk/lib/sequential_executor.js:107:43)at Request.emit ~/node_modules/aws-sdk/lib/sequential_executor.js:77:10)at Request.emit ~/node_modules/aws-sdk/lib/request.js:673:14)at Request.transition (~/node_modules/aws-sdk/lib/request.js:22:10)at AcceptorStateMachine.runTo (~/node_modules/aws-sdk/lib/state_machine.js:14:12) at ~/node_modules/aws-sdk/lib/state_machine.js:26:10 at Request.<anonymous> (~/node_modules/aws-sdk/lib/request.js:38:9) at Request.<anonymous> (~/node_modules/aws-sdk/lib/request.js:675:12) at Request.callListeners (~/node_modules/aws-sdk/lib/sequential_executor.js:115:18) at Request.emit (~node_modules/aws-sdk/lib/sequential_executor.js:77:10)

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