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;" key="login" uri="" method="post" uuid="F727C0D4-4BC6-11F1-A753-0C681BBD9EFC">
    <field widget="text" display="Username" id="uuid-F727F194-4BC6-11F1-A753-0C681BBD9EFC" key="username" attrs="" name="username" value=""/>
    <field widget="password" display="Password" id="uuid-F7283AFA-4BC6-11F1-A753-0C681BBD9EFC" key="password" attrs="" name="password"/>
    <field display="Login" id="uuid-F728855A-4BC6-11F1-A753-0C681BBD9EFC" widget="submit" value="" name="submit" attrs="" key="submit"/>
  </form>
</response>