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 key="login" encoding="&#x2713;" uuid="2015AE0A-C96E-11F1-87B7-30F88D6E13F8" uri="" method="post">
    <field widget="text" display="Username" attrs="" key="username" name="username" value="" id="uuid-2015E712-C96E-11F1-87B7-30F88D6E13F8"/>
    <field name="password" key="password" attrs="" id="uuid-20162E34-C96E-11F1-87B7-30F88D6E13F8" display="Password" widget="password"/>
    <field display="Login" widget="submit" id="uuid-201677C2-C96E-11F1-87B7-30F88D6E13F8" value="" name="submit" key="submit" attrs=""/>
  </form>
</response>