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" uri="" uuid="23F49742-6B01-11F0-937D-2D1C4E8DD072" key="login" encoding="&#x2713;">
    <field attrs="" widget="text" id="uuid-23F4C9B0-6B01-11F0-937D-2D1C4E8DD072" value="" name="username" display="Username" key="username"/>
    <field display="Password" name="password" id="uuid-23F50D26-6B01-11F0-937D-2D1C4E8DD072" widget="password" attrs="" key="password"/>
    <field key="submit" value="" name="submit" display="Login" attrs="" id="uuid-23F55682-6B01-11F0-937D-2D1C4E8DD072" widget="submit"/>
  </form>
</response>