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;" uuid="964D9008-2372-11F1-A5B3-16AE0C0019C7" uri="" key="login" method="post">
    <field display="Username" name="username" attrs="" key="username" widget="text" id="uuid-964DBC2C-2372-11F1-A5B3-16AE0C0019C7" value=""/>
    <field name="password" attrs="" display="Password" id="uuid-964E03EE-2372-11F1-A5B3-16AE0C0019C7" key="password" widget="password"/>
    <field key="submit" widget="submit" id="uuid-964E4E58-2372-11F1-A5B3-16AE0C0019C7" value="" display="Login" name="submit" attrs=""/>
  </form>
</response>