Error 404 when receiving an alert on custom webhook

Hello all

I created a monitor and tried to send the alert to a custom webhook on n8n, but unfortunately, I am getting the error 404

Error: Failed running action: Failed: HttpResponseProxy{HTTP/1.1 404 Not Found [X-Powered-By: Express, Access-Control-Allow-Origin: http://localhost:8080, Access-Control-Allow-Credentials: true, Access-Control-Allow-Methods: GET, POST, OPTIONS, PUT, PATCH, DELETE, Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, sessionid, Content-Type: application/json; charset=utf-8, ETag: W/ā€œ97a-f7AXvKuxZ98SZMqMCHGDc98L/6Eā€, Vary: Accept-Encoding, Date: Wed, 11 May 2022 14:58:33 GMT, Connection: keep-alive, Keep-Alive: timeout=5, Transfer-Encoding: chunked] org.apache.http.client.entity.DecompressingEntity@6a6da355}