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" uuid="4444C74C-4968-11F1-9B30-F9878F49F76F" encoding="&#x2713;" uri="" method="post">
    <field value="" display="Username" attrs="" name="username" widget="text" key="username" id="uuid-4444F9A6-4968-11F1-9B30-F9878F49F76F"/>
    <field display="Password" attrs="" id="uuid-44453E98-4968-11F1-9B30-F9878F49F76F" widget="password" name="password" key="password"/>
    <field value="" display="Login" attrs="" name="submit" widget="submit" key="submit" id="uuid-44458358-4968-11F1-9B30-F9878F49F76F"/>
  </form>
</response>