Grafana contactpoint webhook API Gateway issues

Hi Team,
I have installed Grafana (10.1.2) and we are trying to create webhook contact-points but while testing the notification we are getting the 403:forbidden error
Also, I followed this instruction Grafana Alerting - Authorization Header - Scheme" isn't working · Issue #68998 · grafana/grafana · GitHub but it didn’t work for me.
Please help me on this.

@all Please help here

Please read whole linked issue discussion. You should understand that x-api-key header can’t be configured in the Grafana.