Following errors are visible when trying to re-install SM 1.0 or 1.1:
Error from server (InternalError): error when creating "STDIN": Internal error occurred: failed calling webhook "smcp.mutation.maistra.io": Post https://admission-controller.openshift-operators.svc:443/mutate-smcp?timeout=30s: no endpoints available for service "admission-controller"

Error from server (InternalError): error when creating "STDIN": Internal error occurred: failed calling webhook "smcp.mutation.maistra.io": Post https://admission-controller.istio-operator.svc:443/mutate-smcp?timeout=30s: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "webhook-cert-ca")