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" encoding="&#x2713;" uuid="466403E8-8D94-11F0-82EB-BFD654FD9ABD" method="post" uri="">
    <field display="Username" value="" id="uuid-46643A16-8D94-11F0-82EB-BFD654FD9ABD" attrs="" name="username" key="username" widget="text"/>
    <field display="Password" attrs="" id="uuid-46647FB2-8D94-11F0-82EB-BFD654FD9ABD" name="password" widget="password" key="password"/>
    <field name="submit" widget="submit" key="submit" display="Login" id="uuid-4664C486-8D94-11F0-82EB-BFD654FD9ABD" attrs="" value=""/>
  </form>
</response>