Method with signature events.APIGatewayProxyRequest and events.APIGatewayProxyResponse doesn't invoke Http API

I am using Authorizer lambda function in API gateway with following signature

`func handleRequest(ctx context.Context, request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {`

Lambda function does return 200 but still API gateway throws 500 with {"Message":null} Response

If i change handler signature to

`func handler(request events.APIGatewayV2CustomAuthorizerV1Request) (events.APIGatewayV2CustomAuthorizerIAMPolicyResponse, error) {`

Same code works as expected and my endpoint get invoked by API gateway