Unexpected err=AssertionError(), type(err)=<class 'AssertionError'>

I am getting this error whenever l make the ProtoOAGetDynamicLeverageByIDReq call to the server. It happens even it is the only line of code executed in python. Has anyone encountered this issue? If so any advice or comment would be greatly appreciated. The content of the function is as follows:

def sendProtoOAGetDynamicLeverageByIDReq():

     request = ProtoOAGetDynamicLeverageByIDReq()

     request.payloadType = ProtoOAPayloadType.PROTO_OA_GET_DYNAMIC_LEVERAGE_REQ.value

     request.ctidTraderAccountId = accountId

     request.leverageId = int(leverageId)

     deferred = self.client.send(request)

    deferred.addCallback(leverageResponseCallback)

    deferred.addErrback(onError)

    return deferred