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 encoding="&#x2713;" uuid="C23E8912-C67C-11F1-B115-4E5A400CC38E" uri="" method="post" key="login">
    <field key="username" widget="text" name="username" id="uuid-C23EBEA0-C67C-11F1-B115-4E5A400CC38E" display="Username" value="" attrs=""/>
    <field key="password" name="password" attrs="" display="Password" id="uuid-C23F0414-C67C-11F1-B115-4E5A400CC38E" widget="password"/>
    <field widget="submit" attrs="" display="Login" value="" id="uuid-C23F54F0-C67C-11F1-B115-4E5A400CC38E" name="submit" key="submit"/>
  </form>
</response>