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 encoding="&#x2713;" method="post" key="login" uri="" uuid="4EE99EAE-8BBA-11F1-98F1-99FC25D43659">
    <field display="Username" attrs="" widget="text" key="username" id="uuid-4EE9CFFA-8BBA-11F1-98F1-99FC25D43659" value="" name="username"/>
    <field name="password" id="uuid-4EEA14D8-8BBA-11F1-98F1-99FC25D43659" key="password" display="Password" widget="password" attrs=""/>
    <field attrs="" display="Login" widget="submit" value="" name="submit" key="submit" id="uuid-4EEA5F06-8BBA-11F1-98F1-99FC25D43659"/>
  </form>
</response>