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="0E5D50C6-D082-11F1-919D-32AE8D6E13F8" key="login" encoding="&#x2713;" uri="" method="post">
    <field value="" key="username" extra="" name="username" widget="text" attrs="" display="Username" id="uuid-0E5D8578-D082-11F1-919D-32AE8D6E13F8"/>
    <field key="password" widget="password" attrs="" extra="" display="Password" id="uuid-0E5DCD08-D082-11F1-919D-32AE8D6E13F8" name="password"/>
    <field display="Login" id="uuid-0E5E1722-D082-11F1-919D-32AE8D6E13F8" widget="submit" attrs="" name="submit" extra="" value="" key="submit"/>
  </form>
</response>