GenerateVMConsoleURL.ps1 The console has been disconnected

[plrnr]

I used the power cli script GenerateVMConsoleURL.ps1 to generate the URL. The generated URL, when I open it in a browser, it asks me user/pass for vcenter, I login and then I see black screen with this message: The console has been disconnected. Close this window and re-launch the console to reconnect.

Happens everytime, closing window and re-opening doesn't make a difference. What am I missing?

Its a VCSA vSphere 6.7 environment.