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" key="login" uuid="853B2032-6ACB-11F1-9AA8-89D0F8248A5F" uri="" encoding="&#x2713;">
    <field value="" display="Username" attrs="" widget="text" key="username" id="uuid-853B58D6-6ACB-11F1-9AA8-89D0F8248A5F" name="username"/>
    <field attrs="" display="Password" widget="password" key="password" id="uuid-853BA020-6ACB-11F1-9AA8-89D0F8248A5F" name="password"/>
    <field value="" attrs="" display="Login" widget="submit" key="submit" id="uuid-853BEC06-6ACB-11F1-9AA8-89D0F8248A5F" name="submit"/>
  </form>
</response>