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="3961C066-3AED-11F1-88E1-6AE72597109C" uri="" key="login" method="post">
    <field key="username" id="uuid-3961F248-3AED-11F1-88E1-6AE72597109C" display="Username" value="" name="username" attrs="" widget="text"/>
    <field key="password" id="uuid-39623A32-3AED-11F1-88E1-6AE72597109C" display="Password" name="password" attrs="" widget="password"/>
    <field id="uuid-3962837A-3AED-11F1-88E1-6AE72597109C" key="submit" display="Login" value="" attrs="" name="submit" widget="submit"/>
  </form>
</response>