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" uri="" uuid="CF6D89BA-CB33-11F1-ACDA-D4D849691810" encoding="&#x2713;" key="login">
    <field name="username" display="Username" value="" key="username" widget="text" id="uuid-CF6DBBEC-CB33-11F1-ACDA-D4D849691810" attrs=""/>
    <field attrs="" id="uuid-CF6E0156-CB33-11F1-ACDA-D4D849691810" widget="password" key="password" name="password" display="Password"/>
    <field id="uuid-CF6E4792-CB33-11F1-ACDA-D4D849691810" attrs="" key="submit" widget="submit" value="" display="Login" name="submit"/>
  </form>
</response>