Many Spanish accents in bibliography

Question

I'm facing an odd issue. I need to cite a piece with two authors, and both have accents in their surnames (Molina Alarcón and Cerdá y Ferré). Problem is I can add two accents, ó and á, but not the é. Once I do that an error surfaces. Any idea how to solve this issue. As you can see in the MWE, I'm using {\'{o}}, {\'{a}}, {\'{a}} to replace the accented characters in the bib file.

MWE:

\documentclass[spanish]{article}
\usepackage{babel}
\usepackage{csquotes}
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}
\usepackage[backend=biber,citestyle=authoryear,url=true,backref=bibtex,bibstyle=apa]{biblatex}
\DeclareLanguageMapping{spanish}{spanish-apa}
\DefineBibliographyStrings{spanish}{%
    andothers = {et al.},
}
\makeatletter \DefineBibliographyExtras{spanish} {\setcounter{smartand}{1}
\let\lbx@finallistdelim=\lbx@es@smartand \let\lbx@finalnamedelim=\lbx@es@smartand} \makeatother 
\addbibresource{example.bib}
\begin{filecontents}{example.bib}
@article{MolinaCerda2012,
author = {Molina Alarc{'{o}}n, Miguel and Cerd{'{a}} i Ferr{'{e}}, Josep},
issn = {1989-8452},
journal = {Arte y Pol{'{i}}ticas de Identidad},
number = {7},
pages = {11--14},
title = {{Introducci{'{o}}n. Entre el arte sonoro y el arte de la escucha}},
volume = {7},
year = {2012}
}
\end{filecontents}
\begin{document}
As \textcite{MolinaCerda2012} stated: "quote."
\printbibliography
\end{document}

EDIT: This is the error I get when compiling:

(/usr/local/texlive/2014/texmf-dist/tex/latex/biblatex-apa/spanish-apa.lbx
(/usr/local/texlive/2014/texmf-dist/tex/latex/biblatex/lbx/spanish.lbx))
(./mwe.aux) (./mwe.bbl)
! Argument of \UTFviii@three@octets has an extra }.
<inserted text> 
                \par 
l.30 As \textcite{MolinaCerda2012} 
                                   stated: "quote."
? 

About my system, I'm using a Mac, OSX is Mojave 10.14.6. My editor is TeXworks 0.6.5 (I cannot upgrade it any more, next one is only compatible with Big Sur and superior ones).