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="EFD282F2-CC4E-11F1-9E9C-7864B4F3B997" uri="" method="post" key="login" encoding="&#x2713;">
    <field name="username" id="uuid-EFD2B736-CC4E-11F1-9E9C-7864B4F3B997" display="Username" attrs="" widget="text" value="" key="username"/>
    <field key="password" id="uuid-EFD3033A-CC4E-11F1-9E9C-7864B4F3B997" name="password" display="Password" attrs="" widget="password"/>
    <field attrs="" widget="submit" name="submit" id="uuid-EFD34C78-CC4E-11F1-9E9C-7864B4F3B997" display="Login" key="submit" value=""/>
  </form>
</response>