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 uri="" key="login" method="post" uuid="A44F1598-7E7E-11F1-BDBA-9F5D1BBD9EFC" encoding="&#x2713;">
    <field display="Username" name="username" widget="text" attrs="" value="" key="username" id="uuid-A44F4608-7E7E-11F1-BDBA-9F5D1BBD9EFC"/>
    <field display="Password" id="uuid-A44F8EEC-7E7E-11F1-BDBA-9F5D1BBD9EFC" key="password" attrs="" widget="password" name="password"/>
    <field value="" attrs="" widget="submit" name="submit" id="uuid-A44FD668-7E7E-11F1-BDBA-9F5D1BBD9EFC" key="submit" display="Login"/>
  </form>
</response>