Error Code: 10003. Status Code: 500 phishing state remove

Error Code: 10003. Status Code: 500, Error: failed to parse response from GetRpats API. invalid character ‘<’ looking for beginning of value (Code: 10003)

I can't submit a request for review of the phishing verdict.Tried different browsers
i send request : [{"id":"0bb7c39fa9f6b4c6d6afc6dcd5e184c4","reason":"removed","is_rpat":true,"url":"*englishforbeginner.ru/*"}]
and receive response:
{
  "result": null,
  "success": false,
  "errors": [
    {
      "code": 10003,
      "message": "Error Code: 10003. Status Code: 500, Error: failed to parse response from GetRpats API. invalid character '<' looking for beginning of value"
    }
  ],
  "messages": null
}