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="8BF882F4-CE47-11F1-ADAC-BCCD8D6E13F8" encoding="&#x2713;" key="login" uri="">
    <field name="username" extra="" value="" key="username" id="uuid-8BF8B59E-CE47-11F1-ADAC-BCCD8D6E13F8" display="Username" attrs="" widget="text"/>
    <field display="Password" extra="" id="uuid-8BF90044-CE47-11F1-ADAC-BCCD8D6E13F8" name="password" attrs="" key="password" widget="password"/>
    <field value="" key="submit" name="submit" extra="" widget="submit" attrs="" display="Login" id="uuid-8BF94B30-CE47-11F1-ADAC-BCCD8D6E13F8"/>
  </form>
</response>