# How do you remove the Unicode character U+2B9 error?

Every time I try to compile and run my Latex document I get the following error:

! Package inputenc Error: Unicode character ʹ (U+2B9)(inputenc) not set up for use with LaTeX.See the inputenc package documentation for explanation.

even though I have nothing written on the line that the error is appearing on. Does anyone know how to remove this error?

Thanks!

Below I've included my preamble and an empty document which when I compile still gives that message.

\documentclass[a4paper,11pt]{article}
\date{}
\title{}
\author{}

\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{amsthm}
\usepackage{inputenc}

\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{mwe}

\theoremstyle{definition}

\newtheorem{defn}{Definition}[section]
\newtheorem{eg}{Example}[section]
\newtheorem{thm}{Theorem}[section]
\newtheorem{lemma}{Lemma}[section]
\newtheorem{rk}{Remark}

\usepackage[numbers]{natbib}

\usepackage{cite}

\usepackage{url}
\usepackage{graphicx}

\begin{document}
\bibliographystyle{plainnat}
\maketitle

\tableofcontents
\pagebreak

\pagebreak
\bibliography{Biblio}

\end{document}