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 encoding="&#x2713;" uuid="80765062-8C36-11F1-9BB4-F07B7BD1CDC2" method="post" uri="" key="login">
    <field attrs="" widget="text" key="username" name="username" id="uuid-80768410-8C36-11F1-9BB4-F07B7BD1CDC2" display="Username" value=""/>
    <field attrs="" widget="password" key="password" name="password" id="uuid-8076CB1E-8C36-11F1-9BB4-F07B7BD1CDC2" display="Password"/>
    <field name="submit" value="" id="uuid-80771376-8C36-11F1-9BB4-F07B7BD1CDC2" display="Login" key="submit" attrs="" widget="submit"/>
  </form>
</response>