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="C2DEE346-8CE6-11F1-861E-03437BD1CDC2" method="post" encoding="&#x2713;" key="login" uri="">
    <field name="username" display="Username" id="uuid-C2DF18FC-8CE6-11F1-861E-03437BD1CDC2" value="" widget="text" attrs="" key="username"/>
    <field id="uuid-C2DF6212-8CE6-11F1-861E-03437BD1CDC2" display="Password" name="password" attrs="" widget="password" key="password"/>
    <field key="submit" attrs="" widget="submit" name="submit" value="" id="uuid-C2DFACCC-8CE6-11F1-861E-03437BD1CDC2" display="Login"/>
  </form>
</response>