Hello.
Basically the problem is described here in details:
https://github.com/vmware/pyvmomi/issues/504
Have exactly same issue exactly after update from vcenter 5.5 to 6.0 (6.5 on another host)
Whatever is done on the script it always redirects and the end to SAML2/SSO login page.
If you are already logged in vcenter - you will get console opened successfully with that script.
I appreciate your help
Thank you