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="FD10B5B8-C6F1-11F1-99F0-746E400CC38E" uri="" method="post" key="login">
    <field widget="text" name="username" attrs="" id="uuid-FD10E984-C6F1-11F1-99F0-746E400CC38E" value="" display="Username" key="username"/>
    <field key="password" widget="password" name="password" display="Password" attrs="" id="uuid-FD112C64-C6F1-11F1-99F0-746E400CC38E"/>
    <field widget="submit" name="submit" display="Login" value="" attrs="" id="uuid-FD1172D2-C6F1-11F1-99F0-746E400CC38E" key="submit"/>
  </form>
</response>