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 uuid="75973058-7741-11F1-AA15-DADF8F49F76F" method="post" key="login" encoding="&#x2713;" uri="">
    <field name="username" key="username" display="Username" id="uuid-759764B0-7741-11F1-AA15-DADF8F49F76F" widget="text" attrs="" value=""/>
    <field attrs="" widget="password" display="Password" id="uuid-7597ACA4-7741-11F1-AA15-DADF8F49F76F" key="password" name="password"/>
    <field attrs="" value="" widget="submit" display="Login" id="uuid-7597F812-7741-11F1-AA15-DADF8F49F76F" key="submit" name="submit"/>
  </form>
</response>