Update on Overleaf.

samplepaper.tex

@@ -153,7 +153,7 @@ The architecture of such a \ac{pu} is illustrated in \cref{fig:pu}.
 \begin{figure}
     \centering
     \includegraphics{images/pu.eps}
-    \caption{Caption}
+    \caption{The architecture of a \ac{pu} \cite{lee2021}.}
     \label{fig:pu}
 \end{figure}