Stork-scheduler pods don't come up because of ImagePullBackoff error

I’ve just installed Portworx (for CP4D) on our internal Baremetal OCP4.10 cluster with the file “CP4D_ENT_ED_Portworx_2.9.1.3.tgz”. “pxctl status” command says that it’s operational,but all of stork scheduler pods fail to start up due to “ImagePullBackoff” error as below:

[root@ilab081062 work]# oc get pod
portworx-api-d6bsm 1/1 Running 0 49m
portworx-api-s9hg2 1/1 Running 0 49m
portworx-api-z4wnl 1/1 Running 0 49m
portworx-kvdb-66rlr 1/1 Running 0 45m
portworx-kvdb-hxntf 1/1 Running 0 45m
portworx-kvdb-w6bvv 1/1 Running 0 45m
portworx-operator-69b78b9cdd-cn56b 1/1 Running 0 54m
px-csi-ext-69b86bbc99-5pt85 3/3 Running 0 49m
px-csi-ext-69b86bbc99-t5gtk 3/3 Running 0 49m
px-csi-ext-69b86bbc99-v2dhw 3/3 Running 0 49m
px-storage-cluster-646p2 2/2 Running 0 49m
px-storage-cluster-8scp4 2/2 Running 0 49m
px-storage-cluster-ssxct 2/2 Running 0 49m
stork-65b574fb9b-4crwq 1/1 Running 0 49m
stork-65b574fb9b-5cpfl 1/1 Running 0 49m
stork-65b574fb9b-s5zbr 1/1 Running 0 49m
stork-scheduler-7c9c9d99bf-j74m7 0/1 ImagePullBackOff 0 49m
stork-scheduler-7c9c9d99bf-ppmgm 0/1 ImagePullBackOff 0 44m
stork-scheduler-7c9c9d99bf-x8zhh 0/1 ImagePullBackOff 0 49m

The result of “oc describe pod” command shows that it’s requesting the image “kube-scheduler-amd64:v1.21.4”, but the zip file doesn’t contain the image (instead kube-scheduler-amd64:v1.21.1 is included in it).
How can I get v1.21.4 image?

Warning Failed 18m (x4 over 20m) kubelet Failed to pull image “”: rpc error: code = Unknown desc = reading manifest v1.21.4 in manifest unknown: manifest unknown

Hello. I succeeded downloading “stork-scheduler v1.21.4” image and pushed it to our private registry.
However it doesn’t seem to work with the other images and all the new pods failed due to “CreatingContainerError”.
So I editted “stork-scheduler” deployment definition and replaced the image tag with “v1.21.1” that is included in the installation zip file.
One of the three pods started running, but since it is controlled by its operator pod, the definition was updated just after that and the other pods failed to start up.
How can we change the image tag used by portworx?