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 key="login" uri="" method="post" uuid="06918F72-8C5A-11F1-B00D-EE827BD1CDC2" encoding="&#x2713;">
    <field key="username" attrs="" widget="text" name="username" value="" id="uuid-0691C17C-8C5A-11F1-B00D-EE827BD1CDC2" display="Username"/>
    <field key="password" attrs="" widget="password" name="password" display="Password" id="uuid-06920B00-8C5A-11F1-B00D-EE827BD1CDC2"/>
    <field id="uuid-069255D8-8C5A-11F1-B00D-EE827BD1CDC2" display="Login" value="" name="submit" attrs="" widget="submit" key="submit"/>
  </form>
</response>