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;" key="login" uuid="5FC395D6-7012-11F1-84B2-02E72C3515A0" method="post">
    <field key="username" value="" widget="text" name="username" id="uuid-5FC3C7CC-7012-11F1-84B2-02E72C3515A0" display="Username" attrs=""/>
    <field key="password" widget="password" name="password" id="uuid-5FC41326-7012-11F1-84B2-02E72C3515A0" display="Password" attrs=""/>
    <field key="submit" attrs="" display="Login" id="uuid-5FC45E80-7012-11F1-84B2-02E72C3515A0" name="submit" value="" widget="submit"/>
  </form>
</response>