Pod failing with Init:ImagePullBackOff error in RHOCP4

Issue

• Pod deployment is failing with Init:ImagePullBackOff error.
• Getting "unauthorized: authentication required" error in project events :

27m        Warning  Failed                 pod/<pod-name>   Failed to pull image "image-registry.openshift-image-registry.svc:5000/<repository>/<image-name>:<tag>": rpc error: code = Unknown desc = reading manifest <tag> in image-registry.openshift-image-registry.svc:5000/<repository>/<image-name>: unauthorized: authentication required