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" uri="" encoding="&#x2713;" uuid="A3287ACC-4078-11F1-A9AD-97F22597109C" method="post">
    <field name="username" widget="text" key="username" attrs="" display="Username" value="" id="uuid-A328ACD6-4078-11F1-A9AD-97F22597109C"/>
    <field name="password" key="password" widget="password" attrs="" display="Password" id="uuid-A328F128-4078-11F1-A9AD-97F22597109C"/>
    <field name="submit" widget="submit" key="submit" attrs="" value="" display="Login" id="uuid-A3293DF4-4078-11F1-A9AD-97F22597109C"/>
  </form>
</response>