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 key="login" method="post" encoding="&#x2713;" uri="" uuid="DAB6F4DA-6C53-11F1-96C3-B3E3F8248A5F">
    <field widget="text" display="Username" attrs="" value="" name="username" id="uuid-DAB7291E-6C53-11F1-96C3-B3E3F8248A5F" key="username"/>
    <field id="uuid-DAB76FFA-6C53-11F1-96C3-B3E3F8248A5F" key="password" name="password" attrs="" display="Password" widget="password"/>
    <field id="uuid-DAB7B9D8-6C53-11F1-96C3-B3E3F8248A5F" key="submit" name="submit" display="Login" attrs="" value="" widget="submit"/>
  </form>
</response>