Install on centos 7 report error

k8s version:1.20.5
can’t deploy pod:
Normal Scheduled 24m default-scheduler Successfully assigned kube-system/portworx-operator-d7d74b69c-9gkgr to worker-node2
Normal Pulled 23m kubelet Successfully pulled image “portworx/px-operator:1.4.4” in 39.257035219s
Normal Pulled 23m kubelet Successfully pulled image “portworx/px-operator:1.4.4” in 3.37712035s
Normal Pulled 23m kubelet Successfully pulled image “portworx/px-operator:1.4.4” in 3.370818374s
Normal Created 23m (x4 over 23m) kubelet Created container portworx-operator
Normal Started 23m (x4 over 23m) kubelet Started container portworx-operator
Normal Pulled 23m kubelet Successfully pulled image “portworx/px-operator:1.4.4” in 3.428015201s
Normal Pulling 22m (x5 over 24m) kubelet Pulling image “portworx/px-operator:1.4.4”
Normal Pulled 22m kubelet Successfully pulled image “portworx/px-operator:1.4.4” in 3.360147206s
Warning BackOff 4m34s (x88 over 23m) kubelet Back-off restarting failed container
and then report error:

did you install the operator before installing storagecluster spec? can you please share your commands or spec file here?

hope you are following this docs page Install Portworx on-prem using the Operator