I’m happy to announce the release 1.12.1 of the LaTeX Exporter.
It fixes an issue introduced in version 1.12. See the release notes at https://extensions.xwiki.org/xwiki/bin/view/Extension/LaTeX/#HReleaseNotes
The documentation is at https://extensions.xwiki.org/xwiki/bin/view/Extension/LaTeX/
Enjoy