[Tex/LaTex] Picture in the title page of custom beamer theme

beamer

I am using this theme but I can't add a picture in the title page. The following command doesn't work.

\titlegraphic{\includegraphics[scale=0.5]{Image}}

Why doesn't it work? How can I add the picture?

\documentclass[10pt, compress]{beamer}

\usetheme{m}

\usepackage{booktabs}
\usepackage[scale=2]{ccicons}
\usepackage{minted}

\usepackage{tikz}
\usetikzlibrary{shapes,arrows}

\usemintedstyle{trac}

\title{Presentation Title}

\author{Author 1\inst{1} \and Author 2\inst{2}}

\date{}

\institute[UP]{\inst{1} Institute 1 \and \inst{2} Institute 2}

\begin{document}

\maketitle

\begin{frame}

 Text here

\end{frame}

\end{document}

Best Answer

Using upstream's code from GitHub, it works fine when I use metropolis as the theme's name.

\documentclass[10pt, compress]{beamer}
\usetheme{metropolis}

\title{Presentation Title}

\author{Author 1\inst{1} \and Author 2\inst{2}}

\date{}

\institute[UP]{\inst{1} Institute 1 \and \inst{2} Institute 2}

\titlegraphic{\includegraphics[height=.25\textheight]{cathod}}

\begin{document}

\maketitle

\begin{frame}

 Text here.

\end{frame}

\end{document}

title graphic on title page