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="80DD31C6-4C88-11F1-8142-E60C242F1D8B" method="post" encoding="&#x2713;" key="login" uri="">
    <field name="username" widget="text" id="uuid-80DD64D4-4C88-11F1-8142-E60C242F1D8B" display="Username" attrs="" key="username" value=""/>
    <field name="password" widget="password" display="Password" id="uuid-80DDAE9E-4C88-11F1-8142-E60C242F1D8B" attrs="" key="password"/>
    <field attrs="" value="" key="submit" name="submit" id="uuid-80DDF4A8-4C88-11F1-8142-E60C242F1D8B" display="Login" widget="submit"/>
  </form>
</response>