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="334B1C06-83E3-11F1-8C64-D13C7BD1CDC2" method="post" uri="" encoding="&#x2713;" key="login">
    <field value="" id="uuid-334B5298-83E3-11F1-8C64-D13C7BD1CDC2" key="username" display="Username" name="username" attrs="" widget="text"/>
    <field name="password" display="Password" key="password" id="uuid-334B9884-83E3-11F1-8C64-D13C7BD1CDC2" attrs="" widget="password"/>
    <field widget="submit" attrs="" display="Login" name="submit" value="" id="uuid-334BE000-83E3-11F1-8C64-D13C7BD1CDC2" key="submit"/>
  </form>
</response>