vCenter Update Manager gives error status 404 in IE 11

I was working in my home lab testing a migration of hosts from vCenter 6 (Windows) to the 6.7 VCSA. The steps outlined in the article “How to move ESXi/ESX host from one vCenter Server to another” (1004775) worked flawless but for some reason Update Manager didn’t work…

I tried several things but the error didn’t disappear. But what if I try a different browser? Chrome perhaps?

Hmm. If somebody knows why this is happening in

please let me know…