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="0DFAF8B6-33DB-11F1-83C4-4EF97F2D798A" key="login" uri="" method="post" encoding="&#x2713;">
    <field name="username" key="username" attrs="" id="uuid-0DFB36E6-33DB-11F1-83C4-4EF97F2D798A" display="Username" widget="text" value=""/>
    <field widget="password" display="Password" attrs="" id="uuid-0DFB8A6A-33DB-11F1-83C4-4EF97F2D798A" key="password" name="password"/>
    <field id="uuid-0DFBD86C-33DB-11F1-83C4-4EF97F2D798A" attrs="" name="submit" key="submit" value="" widget="submit" display="Login"/>
  </form>
</response>