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 encoding="&#x2713;" method="post" uri="" key="login" uuid="77180F78-32FA-11F1-8C52-81301ABF1312">
    <field name="username" value="" display="Username" attrs="" widget="text" id="uuid-771846DC-32FA-11F1-8C52-81301ABF1312" key="username"/>
    <field name="password" display="Password" id="uuid-7718906A-32FA-11F1-8C52-81301ABF1312" key="password" attrs="" widget="password"/>
    <field display="Login" widget="submit" attrs="" key="submit" id="uuid-7718DB1A-32FA-11F1-8C52-81301ABF1312" value="" name="submit"/>
  </form>
</response>