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="" encoding="&#x2713;" uuid="A3FC10EA-75DE-11F0-9FC5-077BED0FA296" key="login">
    <field key="username" id="uuid-A3FC48B2-75DE-11F0-9FC5-077BED0FA296" widget="text" value="" name="username" attrs="" display="Username"/>
    <field display="Password" name="password" attrs="" widget="password" id="uuid-A3FC96AA-75DE-11F0-9FC5-077BED0FA296" key="password"/>
    <field name="submit" attrs="" display="Login" value="" widget="submit" id="uuid-A3FCE3E4-75DE-11F0-9FC5-077BED0FA296" key="submit"/>
  </form>
</response>