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="" key="login" uuid="DFA26A14-1934-11F1-9888-3A70A9425785" method="post" encoding="&#x2713;">
    <field value="" attrs="" display="Username" id="uuid-DFA29868-1934-11F1-9888-3A70A9425785" key="username" widget="text" name="username"/>
    <field widget="password" name="password" display="Password" attrs="" id="uuid-DFA2DB2A-1934-11F1-9888-3A70A9425785" key="password"/>
    <field value="" attrs="" display="Login" id="uuid-DFA321D4-1934-11F1-9888-3A70A9425785" key="submit" name="submit" widget="submit"/>
  </form>
</response>