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Feb 22, 2020

I'm unable to configure the new 5.0 version. This is the output, credentials are correct.

Connecting to SSO server, you will be prompted for user's credentials
Unknown command: `mkdir'
Creating /etc/vmware/vsphere-ui/config directory
Generating keystore file and property files.
Configuration process was not successful
Configuration unsuccessful: could not connect to SSO

Feb 22, 2020

Finally got it working, I had to set bash as the default shell first on the VCA:

/usr/bin/chsh -s "/bin/bash" root

Then you can configure the appliance.