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;" method="post" uri="" key="login" uuid="6D574912-7D48-11F0-BF9D-6021F4489F51">
    <field id="uuid-6D577AC2-7D48-11F0-BF9D-6021F4489F51" display="Username" attrs="" name="username" key="username" value="" widget="text"/>
    <field name="password" key="password" widget="password" id="uuid-6D57C2F2-7D48-11F0-BF9D-6021F4489F51" display="Password" attrs=""/>
    <field name="submit" value="" key="submit" widget="submit" id="uuid-6D580D5C-7D48-11F0-BF9D-6021F4489F51" display="Login" attrs=""/>
  </form>
</response>