Problems getting my bibliography working - All citations undefined and "empty bibliography"

Question

I've been stressing out for a few hours now trying to get my project to compile. I was originally using Overleaf but my project got too big to compile and so I'm now attempting to compile it using Texmaker.

On Texmaker when trying to quick build, I get warnings that all of my citations are undefined and my bibliography is empty. I am fairly certain Texmaker sees my bibliography file as I've directed which folder to look in.

Here's my main file shortened to the important bits:

\documentclass[11pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[british]{babel}
\usepackage{csquotes} % Removes babel warning.

\title{\vspace{-5ex}Title}
\author{}
\date{\vspace{-15ex}}

\usepackage[style=ieee,sorting=none,citestyle=numeric,url=true]{biblatex}
\addbibresource{sections/bib.bib}


\section{Project Definition}
\input{sections/definition.tex}

\section{Project Justification}
\input{sections/justification.tex}

\section{Key Literature}
\input{sections/literature.tex}

\section{Project Plan}
\input{sections/plan.tex}

\clearpage

\sloppy
\printbibliography[title=References]

\end{document}