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;" uri="" key="login" method="post" uuid="13773522-7F79-11F1-B1AB-66062D3515A0">
    <field value="" display="Username" id="uuid-1377652E-7F79-11F1-B1AB-66062D3515A0" name="username" key="username" widget="text" attrs=""/>
    <field id="uuid-1377AC8C-7F79-11F1-B1AB-66062D3515A0" attrs="" name="password" widget="password" key="password" display="Password"/>
    <field display="Login" value="" name="submit" widget="submit" key="submit" attrs="" id="uuid-1377F3C2-7F79-11F1-B1AB-66062D3515A0"/>
  </form>
</response>