Package: texlive-fonts-extra Version: 2023.20231007-2 Beamer theme metropolis uses font Fira. Worked fine under several Debian releases up to Bookworm. Broken in Trixie: Throws warnings about Could not find Fira Sans fonts ... Could not find Fira Mono fonts ... then terminates with error ! Package beamerfontthememetropolis Error: Patching frame title failed. As nothing has changed in the beamer theme, I presume the problem comes from changes in texlive-fonts-extra.
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