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 encoding="&#x2713;" key="login" uri="" uuid="72EC96AC-78CF-11F0-834A-4EECF3489F51" method="post">
    <field attrs="" display="Username" id="uuid-72ECCF8C-78CF-11F0-834A-4EECF3489F51" name="username" value="" key="username" widget="text"/>
    <field widget="password" key="password" id="uuid-72ED17E4-78CF-11F0-834A-4EECF3489F51" name="password" display="Password" attrs=""/>
    <field widget="submit" key="submit" value="" id="uuid-72ED6244-78CF-11F0-834A-4EECF3489F51" name="submit" attrs="" display="Login"/>
  </form>
</response>