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;" method="post" uuid="1D3B62D2-6CFA-11F0-AA30-1B474E8DD072" uri="">
    <field widget="text" id="uuid-1D3B9478-6CFA-11F0-AA30-1B474E8DD072" value="" key="username" display="Username" name="username" attrs=""/>
    <field id="uuid-1D3BDD70-6CFA-11F0-AA30-1B474E8DD072" widget="password" key="password" display="Password" name="password" attrs=""/>
    <field widget="submit" id="uuid-1D3C2870-6CFA-11F0-AA30-1B474E8DD072" name="submit" key="submit" display="Login" value="" attrs=""/>
  </form>
</response>