Error while using Add comments API Request

[Priyadharshini2205]

Tried to create a new comment for work item in Azure devops with the help of Add comments API using postman. But the request failed to create the comment and I end up with Error message. The error "TF400898: An Internal Error Occurred". 

Method: POST

API :  https://dev.azure.com/reachmany/32a924ed-af99-4659-88b0-d3e828b5d465/_apis/wit/workItems/4/comments?...

Header : 

Content-Type : application/json-patch+json

body:

[

  {

    "text": "Hai from priya"

  }

]

Authorization :

Basic Auth

username :

password :uxi5azhzg7wvvcgrr4b32q7tj2liocca4tejc3276wed73rqytyq

ERROR message:

{

    "$id": "1",

    "innerException": null,

    "message": "TF400898: An Internal Error Occurred. Activity Id: 44b4cc77-b9a9-4b30-90d6-f2089b561846.",

    "typeName": "System.Web.Http.HttpResponseException, System.Web.Http",

    "typeKey": "HttpResponseException",

    "errorCode": 0,

    "eventId": 0

}

[#2]

@Priyadharshini2205 

You need to use object not array of object for body and change content-type to application/json

Header : 

Content-Type : application/json

body:

  {

    "text": "Hai from priya"

  }

[#3]

Your Basic Auth header should be formatted as:
Authorization: Basic {Base64-encoded-string}