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;" uuid="96DEC122-3BD2-11F1-A050-12C47F2D798A" uri="">
    <field display="Username" name="username" widget="text" key="username" attrs="" value="" id="uuid-96DEFD40-3BD2-11F1-A050-12C47F2D798A"/>
    <field attrs="" key="password" name="password" widget="password" display="Password" id="uuid-96DF4CBE-3BD2-11F1-A050-12C47F2D798A"/>
    <field key="submit" attrs="" name="submit" widget="submit" display="Login" id="uuid-96DF9890-3BD2-11F1-A050-12C47F2D798A" value=""/>
  </form>
</response>