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 method="post" key="login" uuid="F56804B0-16E3-11F1-B0A8-11BD7F2D798A" uri="" encoding="&#x2713;">
    <field name="username" display="Username" widget="text" attrs="" value="" key="username" id="uuid-F5683FCA-16E3-11F1-B0A8-11BD7F2D798A"/>
    <field id="uuid-F56890D8-16E3-11F1-B0A8-11BD7F2D798A" key="password" attrs="" widget="password" display="Password" name="password"/>
    <field id="uuid-F568E4E8-16E3-11F1-B0A8-11BD7F2D798A" key="submit" attrs="" display="Login" value="" widget="submit" name="submit"/>
  </form>
</response>