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" uuid="C1EF4812-7045-11F1-9575-6ED6F8248A5F" uri="" key="login" encoding="&#x2713;">
    <field value="" id="uuid-C1EF78AA-7045-11F1-9575-6ED6F8248A5F" key="username" name="username" widget="text" attrs="" display="Username"/>
    <field widget="password" attrs="" display="Password" id="uuid-C1EFBF4A-7045-11F1-9575-6ED6F8248A5F" key="password" name="password"/>
    <field id="uuid-C1F00932-7045-11F1-9575-6ED6F8248A5F" value="" name="submit" key="submit" attrs="" widget="submit" display="Login"/>
  </form>
</response>