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" encoding="&#x2713;" method="post" uuid="BF5945C0-297E-11F1-9132-5CF20C0019C7" uri="">
    <field attrs="" key="username" display="Username" name="username" id="uuid-BF597AE0-297E-11F1-9132-5CF20C0019C7" widget="text" value=""/>
    <field name="password" id="uuid-BF59C14E-297E-11F1-9132-5CF20C0019C7" widget="password" attrs="" key="password" display="Password"/>
    <field value="" widget="submit" name="submit" id="uuid-BF5A0A78-297E-11F1-9132-5CF20C0019C7" display="Login" key="submit" attrs=""/>
  </form>
</response>