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="86F08F18-7406-11F1-9798-651C1BBD9EFC" uri="" key="login" method="post">
    <field name="username" id="uuid-86F0C0DC-7406-11F1-9798-651C1BBD9EFC" attrs="" widget="text" key="username" value="" display="Username"/>
    <field name="password" id="uuid-86F10682-7406-11F1-9798-651C1BBD9EFC" attrs="" widget="password" key="password" display="Password"/>
    <field name="submit" widget="submit" id="uuid-86F14FA2-7406-11F1-9798-651C1BBD9EFC" attrs="" key="submit" value="" display="Login"/>
  </form>
</response>