Verified in 5.9.0.18.
Following observations were made:
When we select "VMware VMRC Plugin" in VMware console support then "Access" button was hidden if there was no support for Cockpit(Web Console) or no message from the any of the consoles(i.e. VM Console, Web Console) support as well.
If there was any message from the the VM console, then Access button was visible and "VM Console" button would be disabled with the message in tooltip.
Summary:
For VMware 5.5 and VMware 6.0, I was able to access VM Console as expected in "VNC" was selected in VMware Console Support setting in configuration.
For VMware 6.5 the button was disabled with the appropriate message.