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 method="post" uri="" uuid="B744FD94-870B-11F1-97E4-0C3D898B97BA" encoding="&#x2713;" key="login">
    <field name="username" display="Username" value="" id="uuid-B745325A-870B-11F1-97E4-0C3D898B97BA" key="username" widget="text" attrs=""/>
    <field attrs="" id="uuid-B7457B48-870B-11F1-97E4-0C3D898B97BA" key="password" widget="password" name="password" display="Password"/>
    <field attrs="" widget="submit" key="submit" id="uuid-B745C6FC-870B-11F1-97E4-0C3D898B97BA" value="" display="Login" name="submit"/>
  </form>
</response>