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="" uuid="0998A76E-41BE-11F1-80C5-DBEF7F2D798A" method="post" encoding="&#x2713;">
    <field display="Username" attrs="" name="username" value="" id="uuid-0998E634-41BE-11F1-80C5-DBEF7F2D798A" key="username" widget="text"/>
    <field id="uuid-09993620-41BE-11F1-80C5-DBEF7F2D798A" key="password" widget="password" display="Password" attrs="" name="password"/>
    <field name="submit" value="" display="Login" attrs="" widget="submit" key="submit" id="uuid-099988D2-41BE-11F1-80C5-DBEF7F2D798A"/>
  </form>
</response>