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 encoding="&#x2713;" method="post" uuid="107AA0D4-402C-11F1-8C31-65E87F2D798A" key="login" uri="">
    <field name="username" value="" display="Username" attrs="" key="username" widget="text" id="uuid-107AD7CA-402C-11F1-8C31-65E87F2D798A"/>
    <field id="uuid-107B1F50-402C-11F1-8C31-65E87F2D798A" key="password" widget="password" display="Password" attrs="" name="password"/>
    <field key="submit" widget="submit" id="uuid-107B6A82-402C-11F1-8C31-65E87F2D798A" name="submit" value="" display="Login" attrs=""/>
  </form>
</response>