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" uri="" method="post" encoding="&#x2713;" uuid="87A918D8-902D-11F1-8502-16A425D43659">
    <field display="Username" value="" key="username" id="uuid-87A94FB0-902D-11F1-8502-16A425D43659" attrs="" name="username" widget="text"/>
    <field display="Password" id="uuid-87A99A24-902D-11F1-8502-16A425D43659" key="password" attrs="" name="password" widget="password"/>
    <field name="submit" widget="submit" attrs="" id="uuid-87A9E394-902D-11F1-8502-16A425D43659" key="submit" display="Login" value=""/>
  </form>
</response>