Error deploying the demo app in HPA with Custom Metrics in Kubernetes

[roynilanjan]

Hello
I tried implementing this tutorial https://github.com/pixie-io/pixie-demos/tree/main/custom-k8s-metrics-demo .
While deploying the test application with kubectl apply -f demo-app.yaml i get the following error :
Warning: autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
deployment.apps/echo-service unchanged
service/echo-service unchanged
Error from server (BadRequest): error when creating "demo-app.yaml": HorizontalPodAutoscaler in version "v2beta2" cannot be handled as a HorizontalPodAutoscaler: json: cannot unmarshal string into Go struct field HPAScalingPolicy.spec.behavior.scaleDown.policies.value of type int32