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" uri="" key="login" uuid="592A889A-934C-11F0-AD88-CFE02F49FC8C" encoding="&#x2713;">
    <field key="username" attrs="" name="username" display="Username" value="" id="uuid-592AB9F0-934C-11F0-AD88-CFE02F49FC8C" widget="text"/>
    <field widget="password" id="uuid-592B02A2-934C-11F0-AD88-CFE02F49FC8C" display="Password" name="password" key="password" attrs=""/>
    <field display="Login" value="" name="submit" attrs="" key="submit" id="uuid-592B49F6-934C-11F0-AD88-CFE02F49FC8C" widget="submit"/>
  </form>
</response>