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 key="login" uri="" encoding="&#x2713;" method="post" uuid="2864487E-CFB7-11F1-ABC2-835DB4F3B997">
    <field extra="" name="username" value="" display="Username" id="uuid-286479E8-CFB7-11F1-ABC2-835DB4F3B997" attrs="" key="username" widget="text"/>
    <field extra="" widget="password" name="password" display="Password" key="password" id="uuid-2864C434-CFB7-11F1-ABC2-835DB4F3B997" attrs=""/>
    <field id="uuid-28650EA8-CFB7-11F1-ABC2-835DB4F3B997" key="submit" attrs="" display="Login" value="" widget="submit" name="submit" extra=""/>
  </form>
</response>