When I try to use \usepackage[portuguese]{babel} to translate headers to portuguese (for example Chapter to Capítulo),
there is a error in the LaTeX compilation: "Argument of @ "rightmarksection" has an extra }"

If I comment the following lines in ods.tex the error disappear but the fancy style is lost.

\fancyhead[CO]{\small\rightmarktitle} % section title, right center
\fancyhead[RO,LE]{{\small\rightmarksection}}

How to fix the error without losing the style?