I am preparing a document in Latex and it shows error "Undefined control sequence" for \begin{document}
Here is the code I have tried
\documentclass[11pt,a4paper,sans]{moderncv}
\moderncvstyle{classic}
\moderncvcolor{orange}
\usepackage[scale=0.75]{geometry} % Reduce document margins
\usepackage{fancyhdr}
\begin{document}
Content
\end{document}