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="7758008A-74B6-11F1-8C41-0105F9248A5F" encoding="&#x2713;" method="post" key="login" uri="">
    <field value="" display="Username" key="username" widget="text" name="username" attrs="" id="uuid-775831CC-74B6-11F1-8C41-0105F9248A5F"/>
    <field id="uuid-775873C6-74B6-11F1-8C41-0105F9248A5F" attrs="" name="password" key="password" widget="password" display="Password"/>
    <field widget="submit" key="submit" name="submit" attrs="" id="uuid-7758B836-74B6-11F1-8C41-0105F9248A5F" value="" display="Login"/>
  </form>
</response>