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;" uuid="715A2BF8-75A2-11F1-925A-7D311BBD9EFC" key="login" uri="" method="post">
    <field attrs="" widget="text" name="username" key="username" id="uuid-715A5F92-75A2-11F1-925A-7D311BBD9EFC" value="" display="Username"/>
    <field display="Password" id="uuid-715AA5BA-75A2-11F1-925A-7D311BBD9EFC" key="password" name="password" widget="password" attrs=""/>
    <field display="Login" key="submit" value="" id="uuid-715AECB4-75A2-11F1-925A-7D311BBD9EFC" name="submit" widget="submit" attrs=""/>
  </form>
</response>