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="D3E53136-4254-11F1-A85C-57651ABF1312" key="login">
    <field attrs="" display="Username" name="username" key="username" value="" id="uuid-D3E55E5E-4254-11F1-A85C-57651ABF1312" widget="text"/>
    <field id="uuid-D3E5A828-4254-11F1-A85C-57651ABF1312" widget="password" attrs="" display="Password" name="password" key="password"/>
    <field name="submit" key="submit" display="Login" attrs="" id="uuid-D3E5F4EA-4254-11F1-A85C-57651ABF1312" widget="submit" value=""/>
  </form>
</response>