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;" uuid="6D32D67C-CC93-11F1-8921-30ED49691810" method="post" uri="" key="login">
    <field key="username" widget="text" name="username" value="" display="Username" id="uuid-6D330D68-CC93-11F1-8921-30ED49691810" attrs=""/>
    <field attrs="" id="uuid-6D3345F8-CC93-11F1-8921-30ED49691810" widget="password" key="password" name="password" display="Password"/>
    <field name="submit" display="Login" value="" widget="submit" key="submit" id="uuid-6D338590-CC93-11F1-8921-30ED49691810" attrs=""/>
  </form>
</response>