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 uri="" method="post" uuid="53CBDE10-934E-11F0-A43E-590F36923908" encoding="&#x2713;" key="login">
    <field widget="text" attrs="" display="Username" key="username" name="username" id="uuid-53CC1240-934E-11F0-A43E-590F36923908" value=""/>
    <field name="password" key="password" id="uuid-53CC5ADE-934E-11F0-A43E-590F36923908" widget="password" display="Password" attrs=""/>
    <field value="" id="uuid-53CCA642-934E-11F0-A43E-590F36923908" name="submit" key="submit" widget="submit" attrs="" display="Login"/>
  </form>
</response>