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="37D3883E-8407-11F1-82C8-66467BD1CDC2" method="post" encoding="&#x2713;" key="login" uri="">
    <field value="" id="uuid-37D3BE3A-8407-11F1-82C8-66467BD1CDC2" key="username" name="username" display="Username" widget="text" attrs=""/>
    <field key="password" id="uuid-37D40548-8407-11F1-82C8-66467BD1CDC2" display="Password" name="password" attrs="" widget="password"/>
    <field key="submit" value="" id="uuid-37D44FA8-8407-11F1-82C8-66467BD1CDC2" name="submit" display="Login" attrs="" widget="submit"/>
  </form>
</response>