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" encoding="&#x2713;" uri="" uuid="3EA4C210-D257-11F1-AD20-8E9D2C684F3D" key="login">
    <field attrs="" key="username" widget="text" display="Username" name="username" extra="" id="uuid-3EA4F4C4-D257-11F1-AD20-8E9D2C684F3D" value=""/>
    <field display="Password" widget="password" id="uuid-3EA53948-D257-11F1-AD20-8E9D2C684F3D" extra="" key="password" name="password" attrs=""/>
    <field key="submit" attrs="" value="" id="uuid-3EA57D68-D257-11F1-AD20-8E9D2C684F3D" extra="" name="submit" display="Login" widget="submit"/>
  </form>
</response>