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" uuid="3547DBC2-27E8-11F1-9388-A9C97F2D798A" method="post" encoding="&#x2713;" uri="">
    <field value="" key="username" widget="text" name="username" attrs="" display="Username" id="uuid-354818C6-27E8-11F1-9388-A9C97F2D798A"/>
    <field key="password" widget="password" id="uuid-35486416-27E8-11F1-9388-A9C97F2D798A" name="password" display="Password" attrs=""/>
    <field widget="submit" value="" key="submit" display="Login" attrs="" name="submit" id="uuid-3548B40C-27E8-11F1-9388-A9C97F2D798A"/>
  </form>
</response>