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;" method="post" key="login" uri="" uuid="D5D4324C-83F6-11F1-8608-0D5E1BBD9EFC">
    <field attrs="" value="" key="username" name="username" display="Username" widget="text" id="uuid-D5D462EE-83F6-11F1-8608-0D5E1BBD9EFC"/>
    <field display="Password" name="password" attrs="" key="password" id="uuid-D5D4AA56-83F6-11F1-8608-0D5E1BBD9EFC" widget="password"/>
    <field id="uuid-D5D4F3E4-83F6-11F1-8608-0D5E1BBD9EFC" widget="submit" display="Login" key="submit" attrs="" name="submit" value=""/>
  </form>
</response>