How do I solve this error? When I click on it, overleaf doesn't point me to the line where the error is supposed to be, my document is not even 1876 lines long, I have no idea what is wrong and how to fix it.
/usr/local/texlive/2020/texmf-dist/tex/latex/adjustbox/adjustbox.sty, line 1876
LaTeX Error: Command \splitbox already defined.
Or name \end... illegal, see p.192 of the manual.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.1876 }
Your command was ignored.
Type I <command> <return> to replace it with another command,
or <return> to continue without it.
I have very few packages loaded
\documentclass[twocolumn]{aastex63}
\usepackage[utf8]{inputenc}
\newcommand{\vdag}{(v)^\dagger}
\newcommand\aastex{AAS\TeX}
\newcommand\latex{La\TeX}
\usepackage{amsmath}
\usepackage{hyperref}
\usepackage{color,soul}
\usepackage{adjustbox}
I need the adjustbox to fit a long table in one page
\begin{table*}[htp]
\centering
\begin{adjustbox}{width=0.9\textwidth,totalheight=0.9\textheight} %,keepaspectratio
\begin{tabular}{c@{\hspace{3cm}}c@{\hspace{3cm}}c@{\hspace{3cm}}c@{\hspace{3cm}}c}
\multicolumn{5}{c} {} \\ \hline \hline
aastex63class already defines\splitbox, so the packageadjustboxisn't really compatible with the class. The class author(s) should be made aware of this. As alternatives you might want to look at https://tex.stackexchange.com/q/332902/82917, https://tex.stackexchange.com/q/170955/82917, https://tex.stackexchange.com/q/86911/82917, and related. – campa Aug 26 '21 at 09:24\newcommand\latex{La\TeX}(which makes a non standard version of the latex logo) rather than use\LaTeX? – David Carlisle Aug 26 '21 at 09:28