Make.com Webhook Access Problem

Hello,

I have a working webhook in Make - com, which I tested via [ Request Tester - HTTPfy]. The hook catches the data and works great. However, I am having trouble sending data to the same webhook from one of my GPTs. I receive the following error message:

“Error talking to: It seems there was an issue sending the data: the webhook wasn’t found.”

Can anyone provide guidance on how to resolve this issue? Below is the schema I am using. Any help would be greatly appreciated! [It maybe just old eyes: :crazy_face:]

Here is my schema:

{
  "openapi": "3.1.0",
  "info": {
    "title": "MAKE Webhook Integration",
    "description": "OpenAPI specification for POSTing to a MAKE webhook",
    "version": "1.0.0"
  },
  "servers": [
    {      
      "url": "Edited for Post", // edited so post would work 
      "description": "My Description"
    }
  ],
  "paths": {
    "/rp3l1hyq0s57krr86hco2gu4elsqj3gy": {
      "post": {
        "operationId": "SendData",
        "summary": "Post Data to Make Webhook",
        "description": "This endpoint is used to send data to the specified Make webhook to read an expense receipt and take the data and pass it to the webhook so it can be saved into Airtable",
        "requestBody": {
          "description": "Data to be sent to the webhook",
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/WebhookData"
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Successful response",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": {
                      "type": "string"
                    },
                    "status": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Bad Request",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "error": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          },
          "default": {
            "description": "Unexpected error",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "error": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "WebhookData": {
        "type": "object",
        "properties": {
          "suppliersName": {
            "type": "string",
            "description": "Name of the supplier."
          },
          "receiptDescription": {
            "type": "string",
            "description": "Description of the receipt."
          },
          "totalAmount": {
            "type": "number",
            "description": "Total amount of the receipt."
          },
          "taxAmount": {
            "type": "number",
            "description": "Tax amount on the receipt."
          },
          "receiptDate": {
            "type": "string",
            "format": "date",
            "description": "Date of the receipt."
          }
        },
        "required": [
          "suppliersName",
          "receiptDescription",
          "totalAmount"
        ]
      }
    }
  }
}

Yes my old eyes, found it. Thx for the review