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" method="post" encoding="&#x2713;" uri="" uuid="EFA406C6-7DDD-11F1-B169-7EE92C3515A0">
    <field name="username" widget="text" key="username" attrs="" id="uuid-EFA438DA-7DDD-11F1-B169-7EE92C3515A0" display="Username" value=""/>
    <field id="uuid-EFA48010-7DDD-11F1-B169-7EE92C3515A0" attrs="" widget="password" name="password" key="password" display="Password"/>
    <field display="Login" value="" widget="submit" attrs="" name="submit" key="submit" id="uuid-EFA4C9C6-7DDD-11F1-B169-7EE92C3515A0"/>
  </form>
</response>