Knative-serving activator operator fails with "failed calling webhook sidecar-injector.istio.io" in OCP 4

Issue

• Getting error when trying to deploy the Knative Serving (serverless) through the OpenShift Serverless Operator documentation in an environment with istio Service Mesh already installed
• The knative-serving-ingress and istio-system pods are all in a READY state
• The Serverless Operator appears to have deployed all components, but all the replication controllers are hanging up trying to communicate with the istio services
• The replicaset activator is having an issue with a certificate authority