latex package difficulty

[glfan2814]

I'm not sure how to add packages to a template. while the default template works when I try to make a custom template and use that the test configuration just crashes. using Windows 11 and Miketex. I could not find any info. below is the code copied from the attempted template

`% This template uses the scontents package, which is only available on relatively recent TeX distributions. In case it is not available on your system, use the legacy_template.tex
\documentclass[varwidth=true, crop, border=5pt]{standalone}

% Packages
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{chemfig}
\usepackage{longdivision}

% for storing in memory verbatim content to be reused later
\usepackage{scontents}

% Blank formula checking
\usepackage{ifthen}
\newlength{\pheight}

% Color support
\usepackage{xcolor}
\definecolor{xpp_font_color}{HTML}{%%XPP_TEXT_COLOR%%}
% User input
\begin{scontents}[store-env=preview]
(
\displaystyle
%%XPP_TOOL_INPUT%%
)
\end{scontents}

\begin{document}
% Check if the formula is empty
\settoheight{\pheight}{\getstored[1]{preview}}%
\ifthenelse{\pheight=0}{\GenericError{}{xournalpp:blankformula}{}{}}

% Render the user input
\textcolor{xpp_font_color}{\getstored[1]{preview}}
\end{document}`

[rolandlo]

The template looks correct. You have added the chemfig and longdivision packages to the default template. Make sure they are installed in your LaTeX installation and the MikTeX inputs database is refreshed. See e.g. this link for help on installing MikTeX packages.

By the way depending on the version of Xournal++ you use, you have a "Command Output" tab in the LaTeX tool that would show you the error message.