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" key="login" encoding="&#x2713;" uri="" uuid="18E2BEA2-7B2C-11F0-BCC0-839162E0087B">
    <field id="uuid-18E2F3CC-7B2C-11F0-BCC0-839162E0087B" name="username" attrs="" widget="text" display="Username" key="username" value=""/>
    <field key="password" display="Password" widget="password" id="uuid-18E33BCA-7B2C-11F0-BCC0-839162E0087B" attrs="" name="password"/>
    <field name="submit" id="uuid-18E388B4-7B2C-11F0-BCC0-839162E0087B" attrs="" value="" key="submit" display="Login" widget="submit"/>
  </form>
</response>