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" encoding="&#x2713;" uri="" uuid="C333EFB8-CFD9-11F1-B523-1A334A691810" key="login">
    <field value="" display="Username" key="username" extra="" id="uuid-C334264A-CFD9-11F1-B523-1A334A691810" widget="text" attrs="" name="username"/>
    <field name="password" key="password" widget="password" attrs="" id="uuid-C33470FA-CFD9-11F1-B523-1A334A691810" display="Password" extra=""/>
    <field extra="" id="uuid-C334BB32-CFD9-11F1-B523-1A334A691810" widget="submit" attrs="" name="submit" value="" display="Login" key="submit"/>
  </form>
</response>