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="D3E2BE02-488E-11F1-AAB3-15B725D43659" uri="" method="post" encoding="&#x2713;" key="login">
    <field display="Username" name="username" value="" widget="text" id="uuid-D3E2ED28-488E-11F1-AAB3-15B725D43659" attrs="" key="username"/>
    <field key="password" attrs="" widget="password" id="uuid-D3E33440-488E-11F1-AAB3-15B725D43659" display="Password" name="password"/>
    <field name="submit" display="Login" value="" id="uuid-D3E37AAE-488E-11F1-AAB3-15B725D43659" widget="submit" attrs="" key="submit"/>
  </form>
</response>