Split Subfigures over pages without \subcaption using a thesis template

Question

I am using the fauthesis.cls for writing up my dissertation. I am having an issue splitting subfigures figures across pages as I cannot seem to use the \subcaption option. I get the error message"

! Package subcaption Error: This package can't be used in cooperation (subcaption) with the subfigure package.

I found another option that does not give me the error, however, the subfigures do not break across the pages. Can you tell me how I can split subfigures across pages working along the fauthesis.cls?

Here is my code that does not break the subfigures:

\documentclass[phd, 12pt, print]{fauthesis}
\title{Excellent Title}
\author{The Boss Man}
\gender{M}
\graduation{December}{2022}
\department{Fire}
\college{College of Super Heros}
\chair{Dr. Who That}
\dean{Dr. Who That}
\deantitle{Dean}
\dgc{Robin Jr.}[Ph.D.]
\advisor{Super Man}
\supervisor{Spider Man}
\supervisor{Bat Man}
\supervisor{Aqua Man}
\signaturepush{-2.0}                                        %   Increase or decrease the vertical gap between committee and administration signatures
%======================================================================================
%  ADDITIONS
%======================================================================================
% For Tables
\usepackage[table]{xcolor}
%\usepackage{longtable}
\usepackage{bigstrut}
\usepackage{graphicx}
\graphicspath{{Figures/}}
\usepackage{eso-pic}
\usepackage{amsmath,amssymb,amsfonts,bm,mathtools}
%####################     FOR FIGURES        ################
\usepackage{subfigure}
%\usepackage{subcaption}
%\captionsetup{compatibility=false}
\usepackage{booktabs}
\begin{document}
\mainmatter
\begin{figure}
\centering     %%% not \center
\subfigure[Figure A]{\label{fig:a}\includegraphics[width=60mm]{example-image-a}}
\subfigure[Figure B]{\label{fig:b}\includegraphics[width=60mm]{example-image-b}}
\subfigure[Figure C]{\label{fig:c}\includegraphics[width=60mm]{example-image-a}}
\subfigure[Figure D]{\label{fig:d}\includegraphics[width=60mm]{example-image-b}}
\subfigure[Figure E]{\label{fig:e}\includegraphics[width=60mm]{example-image-b}}
\subfigure[Figure F]{\label{fig:f}\includegraphics[width=60mm]{example-image-b}}
\subfigure[Figure G]{\label{fig:g}\includegraphics[width=60mm]{example-image-b}}
\subfigure[Figure H]{\label{fig:h}\includegraphics[width=60mm]{example-image-b}}
\subfigure[Figure I]{\label{fig:i}\includegraphics[width=60mm]{example-image-b}}
\subfigure[Figure J]{\label{fig:j}\includegraphics[width=60mm]{example-image-b}}
\caption{my caption}
\end{figure}
\end{document}

NOTE: With this option however, I lose the formatting setting for the caption found in the fauthesis.cls found from lines 1377:

%%% Caption Formatting
%
% This modifies the default LaTeX format for figure and table captions.
%   Single-line captions are set centered under the figure.
%   Multi-line captions are set centered in a paragraph of width \capwidth.
%
\long\def\@makecaption#1#2{%
    \vskip\abovecaptionskip
    \sbox\@tempboxa{\small{\bfseries #1\/}: #2}%
    \ifdim \wd\@tempboxa > \capwidth
        \@tempdima=\textwidth%
        \advance\@tempdima by -\capwidth%
        \advance\leftskip by 0.5\@tempdima%
        \advance\rightskip by 0.5\@tempdima%
        \singlespacing
        {\bfseries #1\/}: #2\par
    \else
        \hbox to\hsize{\hfil\box\@tempboxa\hfil}%
    \fi
    \vskip\belowcaptionskip}
%
% The default \capwidth is 80% of the \textwidth.
%
\newlength{\capwidth}
\setlength{\capwidth}{0.8\textwidth}

How to maintain this formatting using the subcaption option or is there an easier way to do the splitting of the subfigures across pages using this fauthesis.cls?

Thanks in advance for your help and time!