Why i am not getting Aws Support Response from last 5 days about StepFunction Error StateMachineTypeNotSupported

Hi Hope you doing well.

I have created AWS Technical Support Case but i did not get any response from last 5 days.

Actually i have StepFunction and its type is Standard. i want to connect Apigateway to StepFunction and i want to invoke Apigateway in async manner. 1: i have created I am role :

• Added AwsStepFunctionFullAccess 2: Action is StartSyncExecution and also tried StartExecution. 3: Added http header in Method Request ( InvocationType ) 4: Added http header and map in Integration Request ( Name X-Amz-Invocation-Type Mapped from method.request.header.InvocationType ) 5: Deployed API and enale Cors.

Make request: i give input via PostMan:

{ "input": "{}", "name": "MyExecution", "stateMachineArn": "arn:aws:states:us-east-1:123456789012:stateMachine:HelloWorld" }

i got this Error: { "__type": "com.amazonaws.swf.service.v2.model#StateMachineTypeNotSupported", "message": "This operation is not supported by this type of state machine" }

i have also tried without http header but i got error . If i execute from the console itwork but if i tried via APi it give me this error??

i also used mapping template in Request integration as mentioned in https://docs.aws.amazon.com/step-functions/latest/dg/tutorial-api-gateway.html

kindly solve this provlem i have to start my application in production i have already wasted my precious 5 days for aws support but got nothing.

Thanks