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" key="login" uuid="F3EF69C4-D200-11F1-A1CA-302DB4F3B997" encoding="&#x2713;" uri="">
    <field name="username" widget="text" attrs="" key="username" value="" extra="" display="Username" id="uuid-F3EF9AF2-D200-11F1-A1CA-302DB4F3B997"/>
    <field name="password" extra="" key="password" attrs="" widget="password" id="uuid-F3EFE296-D200-11F1-A1CA-302DB4F3B997" display="Password"/>
    <field value="" extra="" display="Login" id="uuid-F3F02FD0-D200-11F1-A1CA-302DB4F3B997" name="submit" key="submit" widget="submit" attrs=""/>
  </form>
</response>