Error 400 when sending alert to a webhook

I am trying to forward an alert to a webhook on n8n. The query works and it fetches the data, but I am getting this error

> Error: Failed running action: Failed: HttpResponseProxy{HTTP/1.1 400 Bad Request [X-Powered-By: Express, Content-Security-Policy: default-src 'none', X-Content-Type-Options: nosniff, Content-Type: text/html; charset=utf-8, Vary: Accept-Encoding, Date: Sun, 08 May 2022 01:00:20 GMT, Connection: keep-alive, Keep-Alive: timeout=5, Transfer-Encoding: chunked] org.apache.http.client.entity.DecompressingEntity@38ba1e8b}