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 uri="" method="post" encoding="&#x2713;" key="login" uuid="8B532006-8CEA-11F0-9256-9F7D3B611A6C">
    <field name="username" display="Username" id="uuid-8B535134-8CEA-11F0-9256-9F7D3B611A6C" attrs="" key="username" value="" widget="text"/>
    <field display="Password" id="uuid-8B53970C-8CEA-11F0-9256-9F7D3B611A6C" name="password" widget="password" key="password" attrs=""/>
    <field name="submit" display="Login" id="uuid-8B53DF28-8CEA-11F0-9256-9F7D3B611A6C" attrs="" key="submit" widget="submit" value=""/>
  </form>
</response>