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 encoding="&#x2713;" uri="" method="post" uuid="BF4AD91E-8D5A-11F1-9306-9B5DFD48BEF4" key="login">
    <field key="username" name="username" attrs="" widget="text" display="Username" value="" id="uuid-BF4B0A88-8D5A-11F1-9306-9B5DFD48BEF4"/>
    <field attrs="" name="password" key="password" widget="password" display="Password" id="uuid-BF4B529A-8D5A-11F1-9306-9B5DFD48BEF4"/>
    <field attrs="" key="submit" name="submit" widget="submit" display="Login" id="uuid-BF4B9ACA-8D5A-11F1-9306-9B5DFD48BEF4" value=""/>
  </form>
</response>