Openshift oc cluster up fails to connect to 127.0.0.1:8443 - openshift

About OpenShift. I downloaded and unpack the last version of okd (from https://www.okd.io/download.html#oc-platforms)
After, just "oc cluster up"
Apart initial problems due to permissions and to --insecure-registry to be added to docker config, the "installation"/"containers starts" seems to be ok.
But at the end the connection on localhost:8443 is refused.
The linux is a Ubuntu 16.04 LTS running on a Vmware workstation VM.
Any suggestion is welcomed.
Thanks, Lorenzo

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