表格标签代码存在问题

Question

如果您能帮助我解决编译以下绘制表格的代码的问题，我将不胜感激：

\documentclass[preprint, authoryear]{elsarticle}

\journal{Journal of Transportation Research, Part E}
\usepackage{graphicx}
\usepackage{natbib}
\usepackage{textcomp}
\usepackage{siunitx}
\usepackage{amstext}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{multicol}
\setlength{\columnsep}{1cm}
\usepackage{tikz}
\usepackage{lettrine}
\allowdisplaybreaks
\usepackage[export]{adjustbox}
\usepackage{ragged2e}
\usepackage{subfig}
\usepackage{float}
\usepackage{booktabs}
\usepackage{makecell, multirow}
\usepackage{tabularx}
%\usepackage{array}


\newcolumntype{C}[1]{>{\centering\arraybackslash}m{#1}}
\usepackage{url}
\urlstyle{same}
\usepackage[colorlinks=true,linkcolor=black, citecolor=blue, urlcolor=blue]{hyperref}

%% `Elsevier LaTeX' style
\bibliographystyle{elsarticle-harv}
%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}
\section{Introduction}\label{sec: intro}
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\begin{table}[htb]
\caption{Computational Results: Case II, Comparative Results}
\label{label{tab: Case II, Comp}
\centering
    \begin{tabular}{S[table-format=1.2]
                    S[table-format=1.2]
                    S[table-format=1.2]
                *{2}S[table-format=1.5]
                    S[table-format=1.2]}
    \toprule
    {\multirow{2}{*}{\makecell{Model\\ Variant}}}
    & {\multirow{2}{*}{\makecell{AVG.\\ Time $(s)$}}}
    & {\multirow{2}{*}{\makecell{Cost\\ ($\$1E6$)}}}
    & \multicolumn{2}{c}{\makecell{Risk (persons $1E6$)}}
    & {\multirow{2}{*}{\makecell{No. of\\ Z}}} \\   
    \cmidrule{4-5}
    {}& {} & {} & {A} & {B} & {} \\
    \midrule
    {$P_{1}$} & 100 & 100 & 100 & 100 & 100\\
    {$P_{2}$} & 6.11 & 95.06 & 101.02 & 100 & 88.64\\
    \bottomrule
    \end{tabular}
\end{table}
\end{document}