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" key="login" uuid="5C4F0174-2805-11F1-93CB-53211ABF1312" uri="" encoding="&#x2713;">
    <field id="uuid-5C4F30AE-2805-11F1-93CB-53211ABF1312" name="username" display="Username" attrs="" key="username" widget="text" value=""/>
    <field attrs="" widget="password" key="password" id="uuid-5C4F7A1E-2805-11F1-93CB-53211ABF1312" name="password" display="Password"/>
    <field display="Login" name="submit" id="uuid-5C4FC58C-2805-11F1-93CB-53211ABF1312" value="" key="submit" widget="submit" attrs=""/>
  </form>
</response>