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="4CA7993C-712C-11F1-8E04-4CA625D43659" encoding="&#x2713;" uri="" key="login" method="post">
    <field key="username" widget="text" attrs="" display="Username" name="username" value="" id="uuid-4CA7D0F0-712C-11F1-8E04-4CA625D43659"/>
    <field display="Password" attrs="" widget="password" id="uuid-4CA8224E-712C-11F1-8E04-4CA625D43659" name="password" key="password"/>
    <field key="submit" attrs="" display="Login" widget="submit" value="" id="uuid-4CA870E6-712C-11F1-8E04-4CA625D43659" name="submit"/>
  </form>
</response>