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" method="post" encoding="&#x2713;" uuid="11EDB408-4D22-11F1-A7C1-73C88F49F76F" uri="">
    <field key="username" widget="text" name="username" display="Username" attrs="" value="" id="uuid-11EDE270-4D22-11F1-A7C1-73C88F49F76F"/>
    <field widget="password" name="password" key="password" attrs="" display="Password" id="uuid-11EE2EBA-4D22-11F1-A7C1-73C88F49F76F"/>
    <field value="" display="Login" attrs="" id="uuid-11EE77DA-4D22-11F1-A7C1-73C88F49F76F" key="submit" widget="submit" name="submit"/>
  </form>
</response>