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="FCDCBA6E-1A22-11F1-B328-EE00802D798A" method="post" key="login" uri="">
    <field widget="text" display="Username" attrs="" id="uuid-FCDCF7C2-1A22-11F1-B328-EE00802D798A" name="username" value="" key="username"/>
    <field attrs="" id="uuid-FCDD456A-1A22-11F1-B328-EE00802D798A" name="password" display="Password" widget="password" key="password"/>
    <field value="" key="submit" widget="submit" display="Login" name="submit" id="uuid-FCDD975E-1A22-11F1-B328-EE00802D798A" attrs=""/>
  </form>
</response>