Blank XenCenter 7.0.1+ console tab (after latest XenServer 7.0 updates?)

After the most recent round of updates to my XenServer 7.0 installation (up to XS70E036, but not sure whether that has anything to do with my problem, as I also upgraded my XenCenter to 7.1.1 per update notifications), I am no longer able to see the console in XenCenter–it just remains white/blank.

I've tried connecting from different installs of XenCenter on various machines, and, based on what I read in reported issues, also made sure my connection isn't NAT'ed (it's on the same local network as my one and only XenServer node), but still saw the same issue.

I tried the latest XenCenter 7.2.0 on multiple machines: no luck. Then 7.1.1: same thing; then 7.0.1: still a blank console. At this point I was really suspecting the hotfixes I applied (after which I rebooted the server, so I was sure the new toolstack was running), but there's no easy way to uninstall the applied updates, so I was stuck. I seem to recall just a couple months ago, before applying XS70E033, XS70E035, and XS70E036, I was able to see the console, perhaps using version 7.0.1.

Eventually, I found the original XenCenter 7.0.0, and, surprisingly, it worked! I double-checked the newer version on another machine and it was still bad, but as soon as I downgraded that install, it worked, too!