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="F1610792-4A44-11F1-AD04-41FD2C3515A0" encoding="&#x2713;" uri="" method="post" key="login">
    <field id="uuid-F16137E4-4A44-11F1-AD04-41FD2C3515A0" value="" attrs="" widget="text" key="username" display="Username" name="username"/>
    <field id="uuid-F161817C-4A44-11F1-AD04-41FD2C3515A0" attrs="" key="password" display="Password" widget="password" name="password"/>
    <field key="submit" widget="submit" display="Login" name="submit" attrs="" value="" id="uuid-F161CFCE-4A44-11F1-AD04-41FD2C3515A0"/>
  </form>
</response>