Issues Installing Jenkins Operator

I was following this install process:

And are running into this issue when I get to actually creating the Jenkins Instance:
~$ kubectl apply -n jenkins -f jenkins-instance.yaml
Error from server (NotFound): error when creating “jenkins-instance.yaml”: the server could not find the requested resource (post

This is what is returned from:
kubectl get all --all-namspaces

This is an Ubuntu 22.04.3 Server.