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="CEC3FD16-8CF7-11F1-9FA6-76FD25D43659" encoding="&#x2713;" method="post">
    <field value="" widget="text" display="Username" key="username" attrs="" name="username" id="uuid-CEC43466-8CF7-11F1-9FA6-76FD25D43659"/>
    <field key="password" display="Password" attrs="" id="uuid-CEC47E26-8CF7-11F1-9FA6-76FD25D43659" name="password" widget="password"/>
    <field id="uuid-CEC4CB7E-8CF7-11F1-9FA6-76FD25D43659" key="submit" name="submit" attrs="" display="Login" value="" widget="submit"/>
  </form>
</response>