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="18F38C76-7D0D-11F1-A2DD-16202D3515A0" encoding="&#x2713;" uri="" key="login" method="post">
    <field key="username" attrs="" widget="text" name="username" id="uuid-18F3BEB2-7D0D-11F1-A2DD-16202D3515A0" value="" display="Username"/>
    <field id="uuid-18F40796-7D0D-11F1-A2DD-16202D3515A0" name="password" key="password" attrs="" widget="password" display="Password"/>
    <field value="" display="Login" widget="submit" attrs="" name="submit" key="submit" id="uuid-18F45368-7D0D-11F1-A2DD-16202D3515A0"/>
  </form>
</response>