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" uuid="16D3E362-75AE-11F0-8DF1-92E2ED0FA296" method="post" uri="" encoding="&#x2713;">
    <field key="username" id="uuid-16D41C06-75AE-11F0-8DF1-92E2ED0FA296" widget="text" value="" name="username" attrs="" display="Username"/>
    <field display="Password" name="password" attrs="" widget="password" id="uuid-16D468DC-75AE-11F0-8DF1-92E2ED0FA296" key="password"/>
    <field attrs="" name="submit" display="Login" id="uuid-16D4B8BE-75AE-11F0-8DF1-92E2ED0FA296" key="submit" widget="submit" value=""/>
  </form>
</response>