VMware KB: User Name and Password fields does not appear on the vRealize Automation login page.
This problem is between the vRealize Automation 6.2 Client integration plug-in and recent versions of Firefox.
As a workaround, you may be able to move the horizontal scroll bar, causing the screen to be redrawn, thus revealing the username and password input boxes.
Internet Explorer 11 appears to be pretty well behaved and the latest versions of Chrome also work well, though the Flash components may be old.
VMware KB: Registering NSX Manager to vCenter Server or configuring the SSO Lookup Service fails with the error: nested exception is java.net.UnknownHostException.
I have seen this error with customer installations. Even if you don’t run across the error, this KB contains very succinct instructions for troubleshooting basic infrastructure requirements for NSX Manager.