earlier LaTeX version test
xetex removed from checkengines to save some time, because xetex is no longer recommended for LaTeX
in \@CheckKOMAScriptVersion \ExplSyntaxOff replaced by \csname …\endcsname
Unable to change font of headings and toc after installing TeXlive 2026
implementation docu added
\DocumentMetadata usage results in fatal error
Nothing has been changed in KOMA-Script in the font handling since several years. And indeed your example also does not compile without error using TL25 instead of TL26: /usr/local/texlive/2025/texmf-dist/tex/latex/base/fontenc.sty:115: Package font enc Error: Encoding file `lf2enc.def' not found. (fontenc) You might have misspelled the name of the encoding (fontenc) or a required support package (e.g., cyrillic) is (fontenc) missing in your installation. … /usr/local/texlive/2025/texmf-dist/tex/latex/base/fontenc.sty:116:...
Nothing has been changed in KOMA-Script in the font handling since several years. And indeed your example also does not compile without error using TL25 instead of TL26: /usr/local/texlive/2025/texmf-dist/tex/latex/base/fontenc.sty:115: Package font enc Error: Encoding file `lf2enc.def' not found. (fontenc) You might have misspelled the name of the encoding (fontenc) or a required support package (e.g., cyrillic) is (fontenc) missing in your installation. … /usr/local/texlive/2025/texmf-dist/tex/latex/base/fontenc.sty:116:...