Recently, I have been busy preparing to teach an online vRealize Automation: Install, Configure, Manage [V6.2] course and working with clients on SDDC/Automation projects. As a result, I have been looking at VMware resources for class and customers and have put together a page with the items referenced in the student manual and other useful links. Among the usual items like the online documentation and KB articles, VMware has excellent product walkthroughs and free elearning courses. The vRealize Automation 6.2 Install, Configure and Manage class resources page is here.
VMware KB: Running data collection on a new VMware vRealize Orchestrator endpoint in VMware vRealize Automation fails with the error: Full authentication is required to access this resource
This KB article is just one more indicator that you should use lower case for names and addresses for the components of vRealize Automation. I have spent more time than with customers troubleshooting issues related to mixed case host names, dns records, etc.
Do yourself a favor: standardize on lowercase names!
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.