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="541BF824-CEBB-11F1-AE50-C19F2C684F3D" method="post" encoding="&#x2713;" uri="" key="login">
    <field attrs="" key="username" id="uuid-541C2A4C-CEBB-11F1-AE50-C19F2C684F3D" extra="" name="username" value="" display="Username" widget="text"/>
    <field display="Password" attrs="" key="password" widget="password" name="password" id="uuid-541C72CC-CEBB-11F1-AE50-C19F2C684F3D" extra=""/>
    <field attrs="" key="submit" extra="" name="submit" id="uuid-541CB994-CEBB-11F1-AE50-C19F2C684F3D" value="" display="Login" widget="submit"/>
  </form>
</response>