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 uuid="317DF848-8ACE-11F1-8E90-AFBFF5CBB814" encoding="&#x2713;" uri="" method="post" key="login">
    <field attrs="" name="username" key="username" display="Username" widget="text" value="" id="uuid-317E304C-8ACE-11F1-8E90-AFBFF5CBB814"/>
    <field key="password" name="password" attrs="" widget="password" display="Password" id="uuid-317E78F4-8ACE-11F1-8E90-AFBFF5CBB814"/>
    <field widget="submit" display="Login" value="" key="submit" attrs="" name="submit" id="uuid-317EC1CE-8ACE-11F1-8E90-AFBFF5CBB814"/>
  </form>
</response>