Issue when compiling to spanish

[evilmonkey19]

In Spanish we have this phrases like this: ¿Qué problema resolvemos?. I have the issue that it is printed as £Qué problema resolvemos? and I get these issues:

warning: fmtcount.sty:10:
Invalid UTF-8 byte or sequence at line 10 replaced by U+FFFD.
warning: fmtcount.sty:22: Invalid UTF-8 byte or sequence at line 22 replaced by U+FFFD.

I use this in the tex file:

\RequirePackage[utf8]{inputenc}  % Language
\RequirePackage[T1]{fontenc}  % Language
\RequirePackage[spanish]{babel} % Spanish language

[gcarrillodev]

I was able to reproduce your issue and it seems the problem is inputenc. That package is used to feed utf-8 files to engines that don't support it, but tectonic is based on XeTeX, which does. Try removing that line.