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" uuid="1AAF96A8-49CE-11F1-B4D1-711E1BBD9EFC" encoding="&#x2713;" uri="" key="login">
    <field name="username" value="" attrs="" display="Username" id="uuid-1AAFC43E-49CE-11F1-B4D1-711E1BBD9EFC" widget="text" key="username"/>
    <field attrs="" name="password" id="uuid-1AB009EE-49CE-11F1-B4D1-711E1BBD9EFC" display="Password" widget="password" key="password"/>
    <field display="Login" id="uuid-1AB054A8-49CE-11F1-B4D1-711E1BBD9EFC" widget="submit" key="submit" name="submit" attrs="" value=""/>
  </form>
</response>