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 uuid="345AFD9C-CB63-11F1-B739-8865738CD348" encoding="&#x2713;" method="post" uri="" key="login">
    <field attrs="" key="username" widget="text" value="" id="uuid-345B2DC6-CB63-11F1-B739-8865738CD348" display="Username" name="username"/>
    <field attrs="" widget="password" key="password" id="uuid-345B78DA-CB63-11F1-B739-8865738CD348" display="Password" name="password"/>
    <field name="submit" value="" display="Login" id="uuid-345BC290-CB63-11F1-B739-8865738CD348" key="submit" widget="submit" attrs=""/>
  </form>
</response>