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" encoding="&#x2713;" uri="" uuid="7F4A7728-776D-11F1-A323-C414242F1D8B" method="post">
    <field name="username" widget="text" value="" id="uuid-7F4AB2B0-776D-11F1-A323-C414242F1D8B" display="Username" attrs="" key="username"/>
    <field id="uuid-7F4B01A2-776D-11F1-A323-C414242F1D8B" key="password" display="Password" attrs="" name="password" widget="password"/>
    <field display="Login" attrs="" key="submit" id="uuid-7F4B5404-776D-11F1-A323-C414242F1D8B" value="" widget="submit" name="submit"/>
  </form>
</response>