Your bug report

#69123: Guix manual returns a 404 when trying to download FiraSans-Regular.ttf

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 69123@debbugs.gnu.org.

-- 
69123: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=69123
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems