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 uri="" key="login" encoding="&#x2713;" method="post" uuid="79C6161A-CE78-11F1-A503-0A51B4F3B997">
    <field name="username" extra="" value="" id="uuid-79C642DE-CE78-11F1-A503-0A51B4F3B997" attrs="" key="username" display="Username" widget="text"/>
    <field attrs="" id="uuid-79C68BAE-CE78-11F1-A503-0A51B4F3B997" key="password" display="Password" name="password" widget="password" extra=""/>
    <field value="" display="Login" id="uuid-79C6D5AA-CE78-11F1-A503-0A51B4F3B997" attrs="" key="submit" widget="submit" extra="" name="submit"/>
  </form>
</response>