The Lift-Wing proof of concept requires Knative to be installed in order to run KFServing.
We need Knative Serving: v0.14.3+
The Knative docs say to install via k8s CRDs/Operators:
There is also some prior art around creating a custom helm chart (which fits better into the WMF stack):
Note: cluster-local-gateway is required to serve cluster-internal traffic for transformer and explainer use cases (unless we are running v0.19.0).
Please follow instructions here to install cluster local gateway.