Hmm ... strange ... does there exist /etc/texmf/web2c/fmtutil.cnf.rpmnew file? If so you might compare and port changes from the rpmnew file to the already used file ... or simply move the rpmnew file to the final file. The next is to run (as root!) fmtutil-sys --byfmt lualatex 2>&1 | tee fmtutil.log and then attach this mtutil.log as well as /var/lib/texmf/web2c/luahbtex/lualatex.log