LaTeXML is falling

latexmlc --dest index.html \
                    --format=html5 --pmml --mathtex \
                    --css=style.css --splitat=section ../source/index.tex
POSIX class [:cntrl::] unknown in regex; marked by <-- HERE in m/([[:cntrl::] <-- HERE ])/ at /usr/share/perl5/LaTeXML/Common/Error.pm line 364.
Compilation failed in require at /usr/share/perl5/LaTeXML/Common/Config.pm line 22.
BEGIN failed--compilation aborted at /usr/share/perl5/LaTeXML/Common/Config.pm line 22.
Compilation failed in require at /usr/share/perl5/LaTeXML.pm line 22.
BEGIN failed--compilation aborted at /usr/share/perl5/LaTeXML.pm line 22.
Compilation failed in require at /usr/bin/latexmlc line 38.
BEGIN failed--compilation aborted at /usr/bin/latexmlc line 38.
Makefile:43: recipe for target 'html' failed