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 method="post" uuid="DC8233CE-D288-11F1-AC95-5BDD8D6E13F8" encoding="&#x2713;" uri="" key="login">
    <field widget="text" attrs="" value="" extra="" name="username" key="username" display="Username" id="uuid-DC826754-D288-11F1-AC95-5BDD8D6E13F8"/>
    <field id="uuid-DC82AA8E-D288-11F1-AC95-5BDD8D6E13F8" extra="" attrs="" display="Password" widget="password" key="password" name="password"/>
    <field id="uuid-DC82F0D4-D288-11F1-AC95-5BDD8D6E13F8" display="Login" widget="submit" value="" extra="" attrs="" key="submit" name="submit"/>
  </form>
</response>