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" encoding="&#x2713;" uri="" uuid="B4BC6D2A-9894-11F0-96D0-42BA455C7DD5" method="post">
    <field name="username" key="username" widget="text" display="Username" value="" attrs="" id="uuid-B4BCA556-9894-11F0-96D0-42BA455C7DD5"/>
    <field widget="password" key="password" name="password" display="Password" id="uuid-B4BCEBC4-9894-11F0-96D0-42BA455C7DD5" attrs=""/>
    <field id="uuid-B4BD3322-9894-11F0-96D0-42BA455C7DD5" attrs="" value="" display="Login" widget="submit" name="submit" key="submit"/>
  </form>
</response>