With this commit (1df4750) it looks like the Reflector used for multi-networkpolicy cannot get the policies with the following error message:
reflector.go:178] pkg/mod/k8s.io/client-go@v0.18.0/tools/cache/reflector.go:125: Failed to list *v1beta1.MultiNetworkPolicy: the server could not find the requested resource (get multi-networkpolicies.k8s.cni.cncf.io)
Reverting the commit fixes the problem.