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" uuid="1B7ADBF0-D1DD-11F1-B4FB-4A978D6E13F8" method="post" encoding="&#x2713;" uri="">
    <field id="uuid-1B7B0E22-D1DD-11F1-B4FB-4A978D6E13F8" display="Username" widget="text" extra="" value="" attrs="" key="username" name="username"/>
    <field name="password" key="password" display="Password" attrs="" id="uuid-1B7B56FC-D1DD-11F1-B4FB-4A978D6E13F8" extra="" widget="password"/>
    <field key="submit" name="submit" value="" extra="" attrs="" widget="submit" id="uuid-1B7B9E14-D1DD-11F1-B4FB-4A978D6E13F8" display="Login"/>
  </form>
</response>