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" method="post" encoding="&#x2713;" uri="" uuid="5A558BF6-4A22-11F1-BB70-96F42C3515A0">
    <field value="" id="uuid-5A55BB62-4A22-11F1-BB70-96F42C3515A0" key="username" widget="text" display="Username" name="username" attrs=""/>
    <field id="uuid-5A56054A-4A22-11F1-BB70-96F42C3515A0" widget="password" display="Password" key="password" name="password" attrs=""/>
    <field id="uuid-5A564C26-4A22-11F1-BB70-96F42C3515A0" value="" attrs="" widget="submit" key="submit" display="Login" name="submit"/>
  </form>
</response>