latex blank table of contents

Question

1. why the contents table is blank

   i am using texmaker , as a result i get contents title and the rest of the page is blank what did i do wrong

    ...
   
    \documentclass[12pt , a4paper]{report}
    \usepackage[english]{babel}
    \usepackage[utf8]{inputenc}
    \begin{document}
    \newcommand{\HRule}{\rule{\linewidth}{1.5 mm}}
    \pagenumbering{gobble} 
   
   
    \tableofcontents
    \renewcommand{\arraystretch}{1.5}
    \pagestyle{empty}
    \newpage
    ~
    \pagenumbering{arabic}
    \chapter{introduction}
    \end{document}
   
    ...