Comment # 3 on bug 1155381 from Dr. Werner Fink

My guess is that you had an old texlive-fira from TL 2018 but a new
texlive-fira-fonts from TL 2019.  Make sure that all is uptodate, meanwhile
I've added a Require for texlive-fira (and all other font packages as well):

  noether werner/Tests> rpm -q -R texlive-fira | grep texlive-fira
  texlive-fira-fonts >= 2019

to make sure that the correct font version is required, after installing
texlive-fira from TL 2018  the %postttrans scriplet(s) should automatically
enable all setups to make pdflatex work.  If not run as root

 /usr/share/texmf/texconfig/update force