My tex file contains
\documentclass[review]{elsarticle}
\usepackage{arabtex}
\journal{Journal of \LaTeX\ Templates}
\begin{document}
\begin{frontmatter}
\begin{abstract}
Test
\end{abstract}
\begin{keyword}
test .
\end{keyword}
\end{frontmatter}
\end{document}
It's give me the error
! Missing } inserted.
<inserted text>
}
l.26 \end{abstract}
When I remove the abstract block the error is solved but doesn't make sense. and also when I remove the using package "arabtex" and "utf8" the error also solved but my actual paper use those packages.
How to solve this problem, Thanks in advance