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" uri="" uuid="A5225912-3B6C-11F1-9382-C031802D798A" encoding="&#x2713;" key="login">
    <field name="username" widget="text" display="Username" attrs="" key="username" value="" id="uuid-A52290B2-3B6C-11F1-9382-C031802D798A"/>
    <field id="uuid-A522D7FC-3B6C-11F1-9382-C031802D798A" attrs="" key="password" display="Password" widget="password" name="password"/>
    <field key="submit" attrs="" name="submit" widget="submit" display="Login" id="uuid-A5232158-3B6C-11F1-9382-C031802D798A" value=""/>
  </form>
</response>