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 key="login" uri="" uuid="DA58BE76-335D-11F1-AAB2-7EA30C0019C7" method="post" encoding="&#x2713;">
    <field attrs="" widget="text" id="uuid-DA58EF9A-335D-11F1-AAB2-7EA30C0019C7" display="Username" name="username" key="username" value=""/>
    <field id="uuid-DA593A7C-335D-11F1-AAB2-7EA30C0019C7" key="password" name="password" display="Password" widget="password" attrs=""/>
    <field name="submit" display="Login" key="submit" id="uuid-DA59659C-335D-11F1-AAB2-7EA30C0019C7" value="" attrs="" widget="submit"/>
  </form>
</response>