Having the same issue.
Just installed a new fan and wanted to configure it to work with the rest of the items set up in armory crate.
Releasing updates that won't even run is beyond stupidity. It ran just fine before the "update" a few days ago.
Any fix besides "reinstall/reset your system" being worked on?
Nothing helps! We are waiting. I have email with Nate152, who will contact with Asus devs.
In the another 502 error topic, Asus mod suggested to install .NET Core, but for me its changed nothing.
"Please try to download and install Net Core manually from here before installing Armoury Crate."
Same issue here.
This install (Version 18.104.22.168) works great :
The install process is in GERMAN but Armory crate is in English after install.
It shows fam RPM and all.
It keep asking for an update and will launch it automatically even if you discard it so i block internet access through windows defender firewall.