After login as kubeadmin, we run oc adm must-gather --image=quay.io/maistra/istio-must-gather-rhel7:1.0.0

the command output shows some errors and unable to collect several logs:

• Unable to gather previous container logs: previous terminated container "install-cni" in pod "istio-node-22tqv" not found

• [unable to gather container /healthz: the server could not find the requested resource, unable to gather container /version: the server could not find the requested resource, unable to gather container /metrics: the server could not find the requested resource]

• 83 portforward.go:331] an error occurred forwarding 37587 -> 8080: error forwarding port 8080 to pod 4beb6b6fb8cbc6bb6da47cd8bf887cbe7ba8cf588bdc0e4ad265adbd32d19260, uid : exit status 1: 2019/08/22 15:55:31 socat[78219] E connect(5, AF=2 127.0.0.1:8080, 16): Connection refused

• 83 portforward.go:331] an error occurred forwarding 37587 -> 5775: error forwarding port 5775 to pod 7a7bda2d
  60592581c034346df678245c9c486936e6ecd7ab8246a50f3a4c7196, uid : exit status 1: 2019/08/22 15:55:37 socat[79875] E connect(5, AF=2 127.0.
  0.1:5775, 16): Connection refused

....

More details are in the log file attached in this issue.