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="7F5495D6-9394-11F0-A197-41D954FD9ABD" uri="" encoding="&#x2713;" key="login">
    <field widget="text" display="Username" name="username" value="" key="username" id="uuid-7F54C8A8-9394-11F0-A197-41D954FD9ABD" attrs=""/>
    <field display="Password" name="password" widget="password" key="password" id="uuid-7F5512D6-9394-11F0-A197-41D954FD9ABD" attrs=""/>
    <field value="" attrs="" id="uuid-7F555E58-9394-11F0-A197-41D954FD9ABD" key="submit" widget="submit" name="submit" display="Login"/>
  </form>
</response>