两个并列的数字 - Overleaf OK，Texmaker KO

Question

我写了下面的代码，结果在 Overleaf 上没问题，但在 Texmaker 中却报错（未找到‘cat’‘elephant’）：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{subcaption}
\usepackage{graphicx}
\graphicspath{ {Immagini/} }

\begin{document}
\maketitle

\section{Introduction}

\begin{figure}
\centering
\subcaptionbox{A cat\label{cat}}
{\includegraphics{cat}}
\subcaptionbox{An elephant\label{elephant}}
{\includegraphics{elephant}}
\caption{Two animals}\label{animals}
\end{figure}

\end{document}

在包含 tex 文件的文件夹中，我创建了 Immagini 文件夹，并在其中放入了 cat.png 和 elephant.png。

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编辑：日志错误

! LaTeX Error: File `cat' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.22 {\includegraphics{cat}}
                            
I could not locate the file with any of these extensions:
.eps,.ps,.eps.gz,.ps.gz,.eps.Z,.mps
Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.