Workflow: Error Mailgun Automate

{
    "nodes": [
        {
            "name": "Error Trigger",
            "type": "n8n-nodes-base.errorTrigger",
            "position": [
                250,
                500
            ],
            "parameters": [],
            "typeVersion": 1
        },
        {
            "name": "Mailgun",
            "type": "n8n-nodes-base.mailgun",
            "position": [
                450,
                500
            ],
            "parameters": {
                "text": "=Error: {{$node[\"Error Trigger\"].data[\"execution\"][\"error\"][\"message\"]}}\n\nStack Trace:\n{{$node[\"Error Trigger\"].data[\"execution\"][\"error\"][\"stack\"]}}",
                "subject": "=Workflow Error:  {{$node[\"Error Trigger\"].data[\"workflow\"][\"name\"]}}",
                "toEmail": "",
                "fromEmail": ""
            },
            "credentials": {
                "mailgunApi": ""
            },
            "typeVersion": 1
        }
    ],
    "connections": {
        "Error Trigger": {
            "main": [
                [
                    {
                        "node": "Mailgun",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        }
    }
}