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" uri="" key="login" uuid="A55F8FD4-932E-11F1-8EEE-DC10F6CBB814" encoding="&#x2713;">
    <field id="uuid-A55FC3C8-932E-11F1-8EEE-DC10F6CBB814" name="username" key="username" display="Username" widget="text" attrs="" value=""/>
    <field display="Password" widget="password" attrs="" id="uuid-A5600E50-932E-11F1-8EEE-DC10F6CBB814" key="password" name="password"/>
    <field id="uuid-A5605806-932E-11F1-8EEE-DC10F6CBB814" name="submit" key="submit" attrs="" widget="submit" display="Login" value=""/>
  </form>
</response>