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 uri="" key="login" method="post" encoding="&#x2713;" uuid="B63A7E60-238D-11F1-9A8D-FBD40C0019C7">
    <field id="uuid-B63AB056-238D-11F1-9A8D-FBD40C0019C7" value="" key="username" widget="text" name="username" attrs="" display="Username"/>
    <field display="Password" name="password" attrs="" widget="password" key="password" id="uuid-B63AF6C4-238D-11F1-9A8D-FBD40C0019C7"/>
    <field value="" id="uuid-B63B3E72-238D-11F1-9A8D-FBD40C0019C7" key="submit" widget="submit" attrs="" name="submit" display="Login"/>
  </form>
</response>