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 key="login" uri="" encoding="&#x2713;" method="post" uuid="C19DF27A-7CEB-11F1-9802-BC501BBD9EFC">
    <field id="uuid-C19E2010-7CEB-11F1-9802-BC501BBD9EFC" key="username" value="" attrs="" name="username" widget="text" display="Username"/>
    <field id="uuid-C19E68EA-7CEB-11F1-9802-BC501BBD9EFC" key="password" attrs="" name="password" widget="password" display="Password"/>
    <field attrs="" value="" widget="submit" name="submit" id="uuid-C19EB25A-7CEB-11F1-9802-BC501BBD9EFC" key="submit" display="Login"/>
  </form>
</response>