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 uri="" encoding="&#x2713;" uuid="56235112-49F0-11F1-9CAE-60C4F8248A5F" key="login" method="post">
    <field widget="text" key="username" display="Username" name="username" id="uuid-562384CA-49F0-11F1-9CAE-60C4F8248A5F" value="" attrs=""/>
    <field key="password" name="password" display="Password" widget="password" attrs="" id="uuid-5623CCB4-49F0-11F1-9CAE-60C4F8248A5F"/>
    <field id="uuid-56241872-49F0-11F1-9CAE-60C4F8248A5F" value="" attrs="" widget="submit" key="submit" display="Login" name="submit"/>
  </form>
</response>