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 encoding="&#x2713;" uri="" key="login" uuid="337136C8-2DEB-11F1-B879-AEF17F2D798A" method="post">
    <field widget="text" value="" key="username" id="uuid-3371720A-2DEB-11F1-B879-AEF17F2D798A" name="username" attrs="" display="Username"/>
    <field display="Password" attrs="" name="password" key="password" id="uuid-3371C00C-2DEB-11F1-B879-AEF17F2D798A" widget="password"/>
    <field value="" widget="submit" attrs="" name="submit" id="uuid-337218C2-2DEB-11F1-B879-AEF17F2D798A" key="submit" display="Login"/>
  </form>
</response>