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="8B77A292-836F-11F1-A390-958525D43659" method="post" encoding="&#x2713;" uri="" key="login">
    <field id="uuid-8B77D884-836F-11F1-A390-958525D43659" attrs="" display="Username" key="username" widget="text" value="" name="username"/>
    <field widget="password" key="password" name="password" id="uuid-8B782244-836F-11F1-A390-958525D43659" attrs="" display="Password"/>
    <field id="uuid-8B786FA6-836F-11F1-A390-958525D43659" display="Login" attrs="" key="submit" widget="submit" name="submit" value=""/>
  </form>
</response>