I use Gnome Boxes from Fedora 29 (current version, updated as from writing) and try to install Silverblue. But everytime it fails the automated/express installtion with
Failed to pull from repositoiry: g-io-error-quark: No such branch 'fedora/29/x86_64/workstation' in repostory summary(0)
I have removed the file from ~/Downloads and manual downloaded it, but to no avail. The same error happens every single time.