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;" method="post" uuid="A5710254-A39D-11F0-8D64-502736923908" uri="" key="login">
    <field attrs="" id="uuid-A57135BC-A39D-11F0-8D64-502736923908" display="Username" name="username" value="" widget="text" key="username"/>
    <field widget="password" key="password" attrs="" id="uuid-A5718170-A39D-11F0-8D64-502736923908" display="Password" name="password"/>
    <field key="submit" widget="submit" value="" name="submit" id="uuid-A571CDE2-A39D-11F0-8D64-502736923908" display="Login" attrs=""/>
  </form>
</response>