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 uri="" uuid="B6370894-3872-11F1-A159-9DEF0C0019C7" encoding="&#x2713;" key="login" method="post">
    <field widget="text" attrs="" value="" display="Username" id="uuid-B6373A08-3872-11F1-A159-9DEF0C0019C7" key="username" name="username"/>
    <field widget="password" attrs="" key="password" name="password" display="Password" id="uuid-B6378382-3872-11F1-A159-9DEF0C0019C7"/>
    <field widget="submit" attrs="" value="" display="Login" id="uuid-B637CA9A-3872-11F1-A159-9DEF0C0019C7" key="submit" name="submit"/>
  </form>
</response>