Unable to create virtual service

Networking
1

I am unable to create virtual service in my GKE environment. My current istio version is istio-1.16.2.

kubectl apply -f vs.yml
Error from server (InternalError): error when creating “vs.yml”: Internal error occurred: failed calling webhook “validation.istio.io”: failed to call webhook: Post “https://istiod.istio-system.svc:443/validate?timeout=30s”: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
Error from server (InternalError): error when creating “vs.yml”: Internal error occurred: failed calling webhook “validation.istio.io”: failed to call webhook: Post “https://istiod.istio-system.svc:443/validate?timeout=30s”: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

This is the error I am facing. Need an expert opinion on this.

2

The issue was with the firewall rule for port 15017 and target port is 443.
Once the firewall rule was added. The error was resolved