Unknown grader_id : 'mosquitoalert-challenge-2023'

According to the submission instructions, we "must use the challenge_id and grader_id" in the aicrowd.json file. The instructions suggest the following:

      "challenge_id" : "mosquitoalert-challenge-2023",
      "grader_id": "mosquitoalert-challenge-2023",

With the above grader_id, I am receiving the following error log:

Submission failed : Invalid aicrowd.json : Unknown grader_id : 'mosquitoalert-challenge-2023'.Please contact the organisers/admins for a valid grader_id for the challenge you are participating in.