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 uri="" uuid="4B73FA38-C91A-11F1-9B71-5F642C684F3D" encoding="&#x2713;" key="login" method="post">
    <field name="username" widget="text" value="" display="Username" attrs="" key="username" id="uuid-4B742F6C-C91A-11F1-9B71-5F642C684F3D"/>
    <field attrs="" display="Password" key="password" id="uuid-4B747EC2-C91A-11F1-9B71-5F642C684F3D" widget="password" name="password"/>
    <field display="Login" attrs="" id="uuid-4B74C6AC-C91A-11F1-9B71-5F642C684F3D" key="submit" name="submit" widget="submit" value=""/>
  </form>
</response>