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;" key="login" uuid="163C8040-6A72-11F0-B334-355E4E8DD072" uri="" method="post">
    <field display="Username" name="username" value="" id="uuid-163CB6DC-6A72-11F0-B334-355E4E8DD072" widget="text" attrs="" key="username"/>
    <field key="password" attrs="" id="uuid-163CFD22-6A72-11F0-B334-355E4E8DD072" widget="password" display="Password" name="password"/>
    <field key="submit" display="Login" value="" name="submit" widget="submit" id="uuid-163D467E-6A72-11F0-B334-355E4E8DD072" attrs=""/>
  </form>
</response>