Malgré l'ajout de la ligne `\input{configuration/characteristics}` en commentaire j'ai toujours un bug de type "`undefined `undefined control sequence \maketitle`" \maketitle`.
Le fichier "characteristics.tex" `characteristics.tex` est le même que celui dans la question
`\documentclass[mainlanguage=english, question.
\documentclass[mainlanguage=english, secnumdepth=subparagraph,localtocs/depth=subparagraph, localbibs]{yathesis}`
localbibs]{yathesis}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{kpfonts}
\usepackage{booktabs}
\usepackage[separate-uncertainty]{siunitx}
\usepackage{pgfplots}
\usepackage{floatrow}
\usepackage{placeins}
\usepackage{caption}
\usepackage{microtype}
\usepackage{varioref}
\usepackage{pdfpages}
\usepackage{chemformula}
\usepackage{romanbar}
\usepackage{array}
\usepackage{cellspace}
\usepackage{multirow, caption}
\usepackage{xcolor,doc, lipsum}
\usepackage{ragged2e}
\usepackage{ltablex}
\usepackage{tcolorbox}
\usepackage{longtable}
\usepackage{textcomp}
\usepackage[xindy, acronyms]{glossaries}
\usepackage[]{subcaption}
\usepackage[backend=biber,safeinputenc]{biblatex}
\usepackage{hyperref}
%\input{configuration/characteristics}
\begin{document}
\maketitle
\end{document}
