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;" uri="" uuid="E7489B1C-8630-11F1-BD08-0A90FD48BEF4" key="login" method="post">
    <field widget="text" attrs="" name="username" id="uuid-E748CEF2-8630-11F1-BD08-0A90FD48BEF4" display="Username" key="username" value=""/>
    <field widget="password" key="password" display="Password" attrs="" id="uuid-E7491420-8630-11F1-BD08-0A90FD48BEF4" name="password"/>
    <field attrs="" id="uuid-E7496290-8630-11F1-BD08-0A90FD48BEF4" name="submit" value="" key="submit" display="Login" widget="submit"/>
  </form>
</response>