Can I upload a .tex (not zip) file to Overleaf?

Question

I am trying to write a paper for a conference, and I only use Overleaf.

The conference Latex template is given here conference template

However, when I copy the file and build in Overleaf. it give error. The error is:

LaTex Error: File 'aesconf.cls' not found. main.tex, line 3.

THe latex file MWE:

% Template for non-peer-reviewed articled
 \documentclass[convention,peer-reviewed]{aesconf}


% Graphics path
\graphicspath{{./}{figures/}}

% UTF-8 encoding is recommended but use one that works for you.
\usepackage[utf8]{inputenc}

% Highly recommended package for better looking text automatically.
\usepackage{microtype}

% Natbib is used for more control on citations. You can use other modern
% bibliography packages but please try to match the provided style.
\usepackage[numbers,square]{natbib}


% These are useful for different purposes.
\usepackage{booktabs}
\usepackage{color}
\usepackage{url}


% The full title of the paper
\title{Very long title of complex audio algorithms and results}

% Put the authors in order here. The number in brackets define the corresponding affiliation.
\author[1]{John Smith}
\author[1,2]{Teri Jones}
\author[2]{John Maclane}

% Affiliations go here
\affil[1]{First University}
\affil[2]{Second company}



% Correspondece should include the corresponding author's name and e-mail address
\correspondence{John Smith}{john.smith@fakemail.com}

% These are used for headers. Anything that fits is okay. Please use proper punctuation.

% If there are many authors, please use the form "First author et al."
\lastnames{Smith, Jones, and Maclane}

% Short title should describe your topic but not be too long.
\shorttitle{Audio algorithms and results}


% This is required and draws the top title
\include{aestitle}

\begin{document}


\twocolumn[
\maketitle % MANDATORY!

\begin{onecolabstract}
Write the abstract here.
\end{onecolabstract}
]

\section{Introduction}

Introduce to the topic.

\section{Methods}

Show your methods.

\section{Results}

Present results.

\section{Discussion}

Discuss the results.

\section{Examples}

Here are a few examples on LaTeX.

\subsection{Citations}

Citations can be used as follows, \citet{Pulkki1997:VBAPbase} created VBAP and DirAC \citep{Pulkki2007:DirAC_JAES}. Notice the difference in the reference types allowed by natbib-package.

\subsection{Equations}

Equations are used often in text and Equation \ref{eq:firsteq} shows an example of this.
\begin{equation}
\cos(2\alpha)=e^{j2\pi}-2\sin^2(\alpha)
\label{eq:firsteq}
\end{equation}

\subsection{Tables \& figures}

Tables can be created in various ways and for various purposes. The example in Table \ref{tb:firsttb} shows basic trigonometric values using booktabs formatting.

\begin{table}[t]
\caption{This table shows a few trigonometric values.}
\begin{center}
\begin{tabular}{ccc}
\toprule
$\theta$ & $\sin(\theta)$ & $\cos(\theta)$ \\
\midrule
$\pi/4$ & $\sqrt{2}/2$ & $\sqrt{2}/2$ \\
$\pi/3$ & $\sqrt{3}/2$ & $1/2$ \\
$\pi/2$ & $1$ & $0$  \\
\bottomrule
\end{tabular}
\label{tb:firsttb}
\end{center}
\end{table}

There are also various ways to include and even draw figures in LaTeX. The most common is to include them. As is shown with Figures \ref{fg:sincplot} and \ref{fg:AESspec_jet}. LaTeX places the figures in the optimal place in the document by its typesetting rules but appropriate location can be hinted with [t], [b], and [h] arguments (corresponding to top, bottom, and here). Combination of these are also allowed. AES instructions recommend only placing figures and tables at the top or the bottom of the document but getting the preferred result might require some tuning by hand.

\begin{figure}[t]
\begin{center}
\includegraphics[width=0.95\columnwidth]{results.pdf}
\caption{This is an example of using the pdf format showing means and confidence intervals of audiometric data.}
\label{fg:sincplot}
\end{center}
\end{figure}

\begin{figure}[t]
\begin{center}
\includegraphics[width=0.95\columnwidth]{spectrogram.png}
\caption{This is a spectrogram of a spectral delay filtered sawtooth waveform using the png format.}
\label{fg:AESspec_jet}
\end{center}
\end{figure}


\section{Summary}

Summarize your work and conclude.

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\bibliographystyle{jaes}

% Reference to bibliography file.
\bibliography{refs}


\end{document}