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 key="login" encoding="&#x2713;" uri="" method="post" uuid="B3E35584-6888-11F1-9243-C3082D3515A0">
    <field value="" widget="text" key="username" id="uuid-B3E38590-6888-11F1-9243-C3082D3515A0" attrs="" name="username" display="Username"/>
    <field widget="password" key="password" attrs="" name="password" display="Password" id="uuid-B3E3CFC8-6888-11F1-9243-C3082D3515A0"/>
    <field key="submit" widget="submit" value="" display="Login" name="submit" attrs="" id="uuid-B3E41988-6888-11F1-9243-C3082D3515A0"/>
  </form>
</response>