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="1D16CE2C-393C-11F1-8475-F8E17F2D798A" uri="" method="post" encoding="&#x2713;" key="login">
    <field key="username" attrs="" widget="text" display="Username" id="uuid-1D1708A6-393C-11F1-8475-F8E17F2D798A" value="" name="username"/>
    <field id="uuid-1D1754B4-393C-11F1-8475-F8E17F2D798A" display="Password" widget="password" name="password" attrs="" key="password"/>
    <field widget="submit" display="Login" id="uuid-1D17A388-393C-11F1-8475-F8E17F2D798A" name="submit" value="" key="submit" attrs=""/>
  </form>
</response>