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" uri="" encoding="&#x2713;" uuid="ACE1F54A-21AE-11F1-841F-DF96A9425785" method="post">
    <field key="username" value="" display="Username" widget="text" id="uuid-ACE22312-21AE-11F1-841F-DF96A9425785" attrs="" name="username"/>
    <field key="password" display="Password" id="uuid-ACE26A7A-21AE-11F1-841F-DF96A9425785" widget="password" name="password" attrs=""/>
    <field display="Login" value="" key="submit" name="submit" attrs="" id="uuid-ACE2B2D2-21AE-11F1-841F-DF96A9425785" widget="submit"/>
  </form>
</response>