Cross-referencing between different .tex filex

Question

I have a document with multiple chapters written in seperate .tex files. I want to cross reference figures/tables/sections between the .tex files.

So the structure would be:

fulldocument.tex

\documentclass[12pt]{scrartcl}
\usepackage{xr-hyper}
\usepackage{hyperref}
\begin{document}
\include{chapter1.tex}
\include{chapter2.tex}
\end{document}

chapter1.tex

\section{start} \label{sec:start}
\ref{here I would like to cross-reference to a table/section/figure from chapter2.tex}

chapter2.tex

\section{beginning} \label{sec:beginning}
\begin{table}[h]
\centering
\caption{description}
\label{tab:table1}
\begin{tabular}
asdf
\end{tabular}
\end{table}

However, when using \ref-command in chapter1.tex I can only choose the labels from chapter1.tex but not from the other document.

I have looked up the already existing question here (Cross-referencing between different files ) but this suggestion does not work, since I get the error that \usepackage{xr-hyper}is only allowed in the preamble, which is not the case here, since the preamble in my structure is only in fulldocument.tex, not in the other .tex files.

Has someone a solution for me?

Thanks in advance!