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 uri="" encoding="&#x2713;" key="login" uuid="F2A95184-D0C4-11F1-BCC3-FA8C738CD348" method="post">
    <field name="username" key="username" value="" widget="text" attrs="" extra="" id="uuid-F2A983E8-D0C4-11F1-BCC3-FA8C738CD348" display="Username"/>
    <field name="password" attrs="" extra="" key="password" id="uuid-F2A9CC90-D0C4-11F1-BCC3-FA8C738CD348" widget="password" display="Password"/>
    <field name="submit" key="submit" value="" widget="submit" attrs="" id="uuid-F2AA1966-D0C4-11F1-BCC3-FA8C738CD348" extra="" display="Login"/>
  </form>
</response>