It looks like CRD definition wasn’t deployed in your cluster. Or since you had successful tests before, maybe it got destroyed by something?
You can check whether CRD is deployed or not with this command:
kubectl get crd
You should see output similar to this:
NAME CREATED AT
k6s.k6.io 2022-08-19T14:48:27Z
Normally, CRD is deployed with make deploy so if CRD got ‘lost’, this command should be re-run.