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" uri="" encoding="&#x2713;" uuid="44BB6162-19EE-11F1-B5A7-DBCF2597109C" method="post">
    <field widget="text" name="username" display="Username" value="" key="username" id="uuid-44BB9376-19EE-11F1-B5A7-DBCF2597109C" attrs=""/>
    <field id="uuid-44BBD7B4-19EE-11F1-B5A7-DBCF2597109C" attrs="" name="password" widget="password" key="password" display="Password"/>
    <field display="Login" value="" key="submit" widget="submit" name="submit" attrs="" id="uuid-44BC2034-19EE-11F1-B5A7-DBCF2597109C"/>
  </form>
</response>