helm install prometheus-operator

Question

[root@192-168-31-249-master1 ~]# helm install --name imooc-prom --set rbacEnable=true --namespace=monitoring ./prometheus-operatorError: validation failed: [unable to recognize "": no matches for kind "Alertmanager" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "Prometheus" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "PrometheusRule" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1", unable to recognize "": no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1"]