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="CFAE91C2-6BC5-11F0-9211-98E6B03FE236">
    <field id="uuid-CFAEC336-6BC5-11F0-9211-98E6B03FE236" attrs="" display="Username" key="username" name="username" value="" widget="text"/>
    <field attrs="" id="uuid-CFAF1002-6BC5-11F0-9211-98E6B03FE236" key="password" display="Password" name="password" widget="password"/>
    <field attrs="" id="uuid-CFAF5904-6BC5-11F0-9211-98E6B03FE236" key="submit" display="Login" name="submit" value="" widget="submit"/>
  </form>
</response>