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="BDFA6E6C-4CB4-11F1-938C-02B68F49F76F" key="login">
    <field attrs="" display="Username" value="" id="uuid-BDFAA31E-4CB4-11F1-938C-02B68F49F76F" key="username" widget="text" name="username"/>
    <field attrs="" display="Password" id="uuid-BDFAE996-4CB4-11F1-938C-02B68F49F76F" widget="password" name="password" key="password"/>
    <field name="submit" widget="submit" key="submit" id="uuid-BDFB37F2-4CB4-11F1-938C-02B68F49F76F" attrs="" display="Login" value=""/>
  </form>
</response>