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;" uri="" method="post" key="login" uuid="ACDD84FE-45CD-11F1-866C-F7A68F49F76F">
    <field display="Username" name="username" key="username" widget="text" id="uuid-ACDDBAA0-45CD-11F1-866C-F7A68F49F76F" value="" attrs=""/>
    <field display="Password" name="password" key="password" widget="password" id="uuid-ACDE0168-45CD-11F1-866C-F7A68F49F76F" attrs=""/>
    <field attrs="" display="Login" key="submit" name="submit" widget="submit" value="" id="uuid-ACDE4B1E-45CD-11F1-866C-F7A68F49F76F"/>
  </form>
</response>