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="131998A8-4569-11F1-8A38-12BC2C3515A0" encoding="&#x2713;" uri="" method="post" key="login">
    <field widget="text" display="Username" value="" attrs="" id="uuid-1319CA94-4569-11F1-8A38-12BC2C3515A0" key="username" name="username"/>
    <field id="uuid-131A1346-4569-11F1-8A38-12BC2C3515A0" key="password" name="password" display="Password" widget="password" attrs=""/>
    <field value="" widget="submit" display="Login" attrs="" id="uuid-131A5BF8-4569-11F1-8A38-12BC2C3515A0" key="submit" name="submit"/>
  </form>
</response>