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" uuid="E3731F8A-7547-11F0-8612-C62FF4489F51" key="login" uri="" encoding="&#x2713;">
    <field widget="text" name="username" value="" key="username" id="uuid-E3734FB4-7547-11F0-8612-C62FF4489F51" display="Username" attrs=""/>
    <field id="uuid-E37396E0-7547-11F0-8612-C62FF4489F51" key="password" display="Password" attrs="" name="password" widget="password"/>
    <field name="submit" widget="submit" value="" key="submit" id="uuid-E373DFC4-7547-11F0-8612-C62FF4489F51" display="Login" attrs=""/>
  </form>
</response>