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="1CFF95A8-2C13-11F1-A633-2533802D798A" uri="" method="post" key="login" encoding="&#x2713;">
    <field name="username" widget="text" key="username" id="uuid-1CFFD1DA-2C13-11F1-A633-2533802D798A" display="Username" value="" attrs=""/>
    <field widget="password" name="password" display="Password" id="uuid-1D0021BC-2C13-11F1-A633-2533802D798A" key="password" attrs=""/>
    <field id="uuid-1D007216-2C13-11F1-A633-2533802D798A" key="submit" display="Login" name="submit" widget="submit" attrs="" value=""/>
  </form>
</response>