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" encoding="&#x2713;" uri="" uuid="0A874AE0-8895-11F1-94F7-16D725D43659">
    <field widget="text" name="username" id="uuid-0A877BC8-8895-11F1-94F7-16D725D43659" key="username" attrs="" value="" display="Username"/>
    <field display="Password" key="password" attrs="" name="password" id="uuid-0A87C0F6-8895-11F1-94F7-16D725D43659" widget="password"/>
    <field widget="submit" name="submit" id="uuid-0A880D0E-8895-11F1-94F7-16D725D43659" key="submit" attrs="" value="" display="Login"/>
  </form>
</response>