Este es mi preámbulo, he intentado varias cosas, incluida ejecutarlo a través de pdflatex (sin especificación de fuente, etc.) y seguir la documentación correctamente hasta donde puedo decir (aunque está claro que no). He usado TeXworks y TexStudio.
\documentclass[12pt]{article}
\usepackage[a4paper]{geometry}
\usepackage{fontspec}
\linespread{1.5}
\setmainfont{Times New Roman}
\usepackage{siunitx}
\title{a title}
\author{a name}
\newpage
\setcounter{page}{1}
\bibliography{essay}
\bibliographystyle{apalike}
\begin{document}
Este es el registro cuando intento compilar
Missing \begin{document}. \begin{thebibliography}{}
Missing \begin{document}. \begin{thebibliography}{}
Empty `thebibliography' environment
Citation `Pyne05' on page 2 undefined
Citation `loturco15' on page 2 undefined
Citation `till15' on page 2 undefined
Citation `Haguenauer05' on page 2 undefined
Citation `baptista16' on page 2 undefined
Citation `atkinson98' on page 2 undefined
Citation `atkinson98' on page 2 undefined
Citation `safrit' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `leard' on page 2 undefined
Citation `comyns23' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `klavora' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `leard' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `leard' on page 2 undefined
Citation `comyns23' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `leard' on page 2 undefined
Citation `comyns23' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `comyns23' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `leard' on page 2 undefined
Citation `buckthorpe12' on page 2 undefined
Citation `comyns23' on page 2 undefined
Citation `leard' on page 2 undefined
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
There were undefined references.
No tengo idea de por dónde empezar con lo que está yendo mal. Después de leer varios artículos sobre solución de problemas, no puedo encontrar nada que sea lo suficientemente obvio como para notarlo.