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="5F99616C-8908-11F1-819E-8C17F6CBB814" encoding="&#x2713;" method="post" key="login">
    <field key="username" id="uuid-5F99938A-8908-11F1-819E-8C17F6CBB814" display="Username" name="username" widget="text" attrs="" value=""/>
    <field widget="password" name="password" attrs="" display="Password" key="password" id="uuid-5F99DBF6-8908-11F1-819E-8C17F6CBB814"/>
    <field key="submit" id="uuid-5F9A2566-8908-11F1-819E-8C17F6CBB814" display="Login" attrs="" value="" name="submit" widget="submit"/>
  </form>
</response>