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="8E95DF02-3ECD-11F1-8548-F6C60C0019C7" method="post" uri="" key="login">
    <field widget="text" name="username" attrs="" id="uuid-8E960E28-3ECD-11F1-8548-F6C60C0019C7" key="username" display="Username" value=""/>
    <field widget="password" name="password" attrs="" key="password" display="Password" id="uuid-8E965932-3ECD-11F1-8548-F6C60C0019C7"/>
    <field value="" display="Login" key="submit" id="uuid-8E96A16C-3ECD-11F1-8548-F6C60C0019C7" name="submit" attrs="" widget="submit"/>
  </form>
</response>