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="ECD93036-713D-11F0-B9D8-4D004E8DD072" encoding="&#x2713;" uri="" method="post" key="login">
    <field name="username" key="username" widget="text" value="" display="Username" attrs="" id="uuid-ECD96448-713D-11F0-B9D8-4D004E8DD072"/>
    <field attrs="" id="uuid-ECD9A9B2-713D-11F0-B9D8-4D004E8DD072" name="password" key="password" display="Password" widget="password"/>
    <field id="uuid-ECD9F39A-713D-11F0-B9D8-4D004E8DD072" attrs="" value="" widget="submit" display="Login" name="submit" key="submit"/>
  </form>
</response>