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="F2B435F2-6C77-11F0-96F5-DCD8F3489F51" uri="" encoding="&#x2713;" method="post" key="login">
    <field display="Username" value="" id="uuid-F2B466D0-6C77-11F0-96F5-DCD8F3489F51" attrs="" name="username" key="username" widget="text"/>
    <field name="password" attrs="" widget="password" key="password" display="Password" id="uuid-F2B4AE38-6C77-11F0-96F5-DCD8F3489F51"/>
    <field id="uuid-F2B4F5F0-6C77-11F0-96F5-DCD8F3489F51" value="" display="Login" widget="submit" key="submit" name="submit" attrs=""/>
  </form>
</response>