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" uri="" uuid="90734B7C-8DC3-11F0-9649-F3B5455C7DD5" encoding="&#x2713;" key="login">
    <field attrs="" widget="text" display="Username" name="username" key="username" id="uuid-90737FCA-8DC3-11F0-9649-F3B5455C7DD5" value=""/>
    <field key="password" id="uuid-9073C480-8DC3-11F0-9649-F3B5455C7DD5" display="Password" name="password" attrs="" widget="password"/>
    <field display="Login" name="submit" attrs="" widget="submit" value="" id="uuid-90740FDA-8DC3-11F0-9649-F3B5455C7DD5" key="submit"/>
  </form>
</response>