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 encoding="&#x2713;" key="login" uuid="816446A8-497B-11F1-8B03-5B8D25D43659" uri="" method="post">
    <field name="username" display="Username" value="" widget="text" id="uuid-816481B8-497B-11F1-8B03-5B8D25D43659" key="username" attrs=""/>
    <field display="Password" name="password" widget="password" id="uuid-8164C9F2-497B-11F1-8B03-5B8D25D43659" key="password" attrs=""/>
    <field id="uuid-816518EE-497B-11F1-8B03-5B8D25D43659" widget="submit" key="submit" attrs="" display="Login" name="submit" value=""/>
  </form>
</response>