As part of the desktop rebase in 7.6, we need to rebase libosinfo to the version that is shipped in Fedora 28 and is needed by gnome-boxes.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.