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="8C9C981A-9A1F-11F0-84A1-D2C8455C7DD5" uri="" key="login" encoding="&#x2713;">
    <field display="Username" key="username" name="username" widget="text" value="" attrs="" id="uuid-8C9CCE84-9A1F-11F0-84A1-D2C8455C7DD5"/>
    <field display="Password" key="password" name="password" widget="password" attrs="" id="uuid-8C9D15E2-9A1F-11F0-84A1-D2C8455C7DD5"/>
    <field value="" attrs="" id="uuid-8C9D606A-9A1F-11F0-84A1-D2C8455C7DD5" display="Login" name="submit" key="submit" widget="submit"/>
  </form>
</response>