Stardog post api for update Sparql queries return 400 Bad request error

Support Bug
1

I am trying to make a http post cal to stardog to insert data using sparql insert query
API: localhost:5820/platts-ontology/update
MEthod := post
headers := Content-Type: application/sparql-update
Payload : query=INSERT DATA { my triple to insert }

Error : 400 Bad Request

Can you please help me how to send update request using http api
I am following below documentation and dont see much help
https://stardog-union.github.io/http-docs/#operation/updatePost
https://stardog.docs.apiary.io/#reference/core-api/executing-a-query

I see the below error on error log
com.complexible.stardog.protocols.http.server.StardogUndertowErrorHandler:accept(68): Unexpected exception was handled by the server
java.lang.IllegalArgumentException: Query string cannot be empty

2

FYI, This works fine with python code and not from postman

import requests

url = 'http://localhost:5820/platts-ontology/update'
myobj = 'INSERT DATA {:S :P :O}'.encode()
myobj = 'INSERT DATA { <http://asd.com/rah> a "asd" . }'



x = requests.post(url, data = myobj, headers = {"Content-Type": "application/sparql-update"})

print(x)
print(myobj)