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 uri="" key="login" encoding="&#x2713;" uuid="EED66132-23F4-11F1-BB35-482A1ABF1312" method="post">
    <field name="username" id="uuid-EED698B4-23F4-11F1-BB35-482A1ABF1312" value="" key="username" widget="text" attrs="" display="Username"/>
    <field display="Password" key="password" id="uuid-EED6DFFE-23F4-11F1-BB35-482A1ABF1312" name="password" widget="password" attrs=""/>
    <field display="Login" name="submit" id="uuid-EED73C92-23F4-11F1-81AC-482A1ABF1312" value="" key="submit" widget="submit" attrs=""/>
  </form>
</response>