I am using EKS Fargate and trying to use AWS built-in Fluent Bit to send logs to Elastic Cloud, but I am encountering the following error:

{ "log": "[2024/05/16 14:35:17] [error] [output:es:es.0] HTTP status=400 URI=/_bulk, response:" }

{
    "log": "{"error":{"root_cause":[{"type":"x_content_parse_exception","reason":"[1:24] Unexpected character ('l' (code 108)): was expecting comma to separate Object entries\n at [Source: (byte[])\"{\"create\":{\"_index\":\"\"leoh-logging\"\"}}\"; line: 1, column: 24]"}],"type":"x_content_parse_exception","reason":"[1:24] Unexpected character ('l' (code 108)): was expecting comma to separate Object entries\n at [Source: (byte[])\"{\"create\":{\"_index\":\"\"leoh-logging\"\"}}\"; line: 1, column: 24]","caused_by":{"type":"json_parse_exception","reason":"Unexpected character ('l' (code 108)): was expecting comma to separate Object entries\n at [Source: (byte[])\"{\"create\":{\"_index\":\"\"leoh-logging\"\"}}\"; line: 1, column: 24]"}},"status":400}"
}

Here is my output configuration:

  [OUTPUT]
  Name  es
  Match *
  Index "leoh-logging"
  Host  xxx
  Port  9243
  HTTP_User elastic-beats
  HTTP_Passwd xxxx
  tls   On
  tls.verify Off
  Suppress_Type_Name On

I have checked my configuration and ensured that the credentials are correct. However, I still receive this error. Has anyone encountered a similar issue or has experience in resolving this error? Any help would be greatly appreciated.

Thank you very much!