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="88317E7A-286E-11F1-969C-B701802D798A" key="login" encoding="&#x2713;" uri="" method="post">
    <field widget="text" key="username" value="" id="uuid-8831EA7C-286E-11F1-969C-B701802D798A" display="Username" attrs="" name="username"/>
    <field id="uuid-88323C66-286E-11F1-969C-B701802D798A" attrs="" display="Password" name="password" widget="password" key="password"/>
    <field display="Login" attrs="" name="submit" id="uuid-88328C48-286E-11F1-969C-B701802D798A" widget="submit" key="submit" value=""/>
  </form>
</response>