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 method="post" uuid="1E3B0790-D05F-11F1-8F11-32412C684F3D" uri="" key="login" encoding="&#x2713;">
    <field attrs="" key="username" name="username" extra="" id="uuid-1E3B45DE-D05F-11F1-8F11-32412C684F3D" value="" display="Username" widget="text"/>
    <field display="Password" key="password" attrs="" widget="password" extra="" name="password" id="uuid-1E3B8B98-D05F-11F1-8F11-32412C684F3D"/>
    <field value="" display="Login" widget="submit" attrs="" key="submit" name="submit" id="uuid-1E3BDAA8-D05F-11F1-8F11-32412C684F3D" extra=""/>
  </form>
</response>