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 method="post" key="login" uuid="612B882A-6FE5-11F1-ADE5-38DF2C3515A0" encoding="&#x2713;" uri="">
    <field key="username" display="Username" attrs="" id="uuid-612BBCE6-6FE5-11F1-ADE5-38DF2C3515A0" name="username" widget="text" value=""/>
    <field attrs="" display="Password" name="password" id="uuid-612C02C8-6FE5-11F1-ADE5-38DF2C3515A0" widget="password" key="password"/>
    <field id="uuid-612C4F76-6FE5-11F1-ADE5-38DF2C3515A0" name="submit" display="Login" attrs="" value="" widget="submit" key="submit"/>
  </form>
</response>