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;" key="login" uuid="D6D15EE6-8CC4-11F1-815C-4BEEF5CBB814" uri="" method="post">
    <field widget="text" value="" name="username" key="username" id="uuid-D6D18B82-8CC4-11F1-815C-4BEEF5CBB814" display="Username" attrs=""/>
    <field display="Password" attrs="" id="uuid-D6D1CCDC-8CC4-11F1-815C-4BEEF5CBB814" key="password" name="password" widget="password"/>
    <field name="submit" key="submit" widget="submit" value="" id="uuid-D6D20F9E-8CC4-11F1-815C-4BEEF5CBB814" attrs="" display="Login"/>
  </form>
</response>