XSLT Error

Empty filename at /home/ubuntu/perl5/perlbrew/perls/perl-5.18.0/lib/site_perl/5.18.0/Chameleon5/Template/XSLT.pm line 575.

Response XML

<?xml version="1.0"?>
<response>
  <form uuid="9EB75256-D245-11F1-8137-AD150C50D6CE" key="login" uri="" method="post" encoding="&#x2713;">
    <field extra="" widget="text" id="uuid-9EB7860E-D245-11F1-8137-AD150C50D6CE" name="username" value="" display="Username" attrs="" key="username"/>
    <field extra="" widget="password" display="Password" id="uuid-9EB7D546-D245-11F1-8137-AD150C50D6CE" name="password" attrs="" key="password"/>
    <field widget="submit" id="uuid-9EB81EC0-D245-11F1-8137-AD150C50D6CE" extra="" name="submit" display="Login" value="" attrs="" key="submit"/>
  </form>
</response>