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 uuid="81919E14-6B59-11F1-8388-07818F49F76F" encoding="&#x2713;" uri="" method="post" key="login">
    <field name="username" key="username" display="Username" id="uuid-8191D2E4-6B59-11F1-8388-07818F49F76F" attrs="" value="" widget="text"/>
    <field name="password" key="password" display="Password" id="uuid-81921B78-6B59-11F1-8388-07818F49F76F" attrs="" widget="password"/>
    <field display="Login" name="submit" key="submit" id="uuid-8192640C-6B59-11F1-8388-07818F49F76F" widget="submit" attrs="" value=""/>
  </form>
</response>