spec.imagePullSecrets

 apiVersion: v1
kind: Pod
metadata:
  name: private-reg
spec:
  containers:
  - name: private-reg-container
    image: <your-private-image>
  imagePullSecrets:
  - name: regcred

Error: INSTALLATION FAILED: 1 error occurred:
	* Deployment in version "v1" cannot be handled as a Deployment: json: cannot unmarshal string into Go struct field 
PodSpec.spec.template.spec.imagePullSecrets of type v1.LocalObjectReference

Related

• imagePullSecrets:
• Pull an Image from a Private Registry in Kubernetes

See also

• Kubernetes secrets: kubectl [ get | create | describe | delete | secret ] secrets, secret.yml, kind: Secret, secretKeyRef, default-token, imagePullSecrets:, kubernetes.io/dockerconfigjson
• kind: Pod: spec.containers, spec.initContainers, spec.volumes, spec.securityContext