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 method="post" uri="" key="login" encoding="&#x2713;" uuid="38AE0DB6-7601-11F0-BCC7-FDCFB03FE236">
    <field display="Username" attrs="" key="username" name="username" value="" widget="text" id="uuid-38AE3F3E-7601-11F0-BCC7-FDCFB03FE236"/>
    <field id="uuid-38AE8976-7601-11F0-BCC7-FDCFB03FE236" widget="password" key="password" name="password" attrs="" display="Password"/>
    <field display="Login" attrs="" key="submit" name="submit" value="" widget="submit" id="uuid-38AED32C-7601-11F0-BCC7-FDCFB03FE236"/>
  </form>
</response>