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="60AB3B16-893A-11F1-8BC1-2520F6CBB814" uri="" key="login" encoding="&#x2713;" method="post">
    <field attrs="" value="" widget="text" name="username" id="uuid-60AB6DF2-893A-11F1-8BC1-2520F6CBB814" key="username" display="Username"/>
    <field attrs="" widget="password" name="password" display="Password" key="password" id="uuid-60ABB10E-893A-11F1-8BC1-2520F6CBB814"/>
    <field id="uuid-60ABF8C6-893A-11F1-8BC1-2520F6CBB814" key="submit" display="Login" attrs="" value="" widget="submit" name="submit"/>
  </form>
</response>