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" method="post" uuid="8CCAD860-8FA6-11F1-979F-3082400CC38E" uri="" encoding="&#x2713;">
    <field widget="text" id="uuid-8CCB1212-8FA6-11F1-979F-3082400CC38E" key="username" value="" display="Username" name="username" attrs=""/>
    <field id="uuid-8CCB57FE-8FA6-11F1-979F-3082400CC38E" key="password" widget="password" attrs="" display="Password" name="password"/>
    <field value="" widget="submit" key="submit" id="uuid-8CCBA42A-8FA6-11F1-979F-3082400CC38E" name="submit" display="Login" attrs=""/>
  </form>
</response>