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="149EDD6C-6C63-11F0-9BAD-8D89160DF820" uri="" method="post" key="login">
    <field key="username" widget="text" attrs="" id="uuid-149F0FE4-6C63-11F0-9BAD-8D89160DF820" display="Username" value="" name="username"/>
    <field display="Password" id="uuid-149F5710-6C63-11F0-9BAD-8D89160DF820" attrs="" name="password" key="password" widget="password"/>
    <field key="submit" widget="submit" attrs="" id="uuid-149FA418-6C63-11F0-9BAD-8D89160DF820" display="Login" value="" name="submit"/>
  </form>
</response>