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="C9FF96A4-4D5B-11F1-9AFC-571AF9248A5F" uri="" encoding="&#x2713;" key="login">
    <field attrs="" id="uuid-C9FFCCF0-4D5B-11F1-9AFC-571AF9248A5F" key="username" name="username" display="Username" widget="text" value=""/>
    <field attrs="" id="uuid-CA00166A-4D5B-11F1-9AFC-571AF9248A5F" key="password" display="Password" name="password" widget="password"/>
    <field value="" widget="submit" name="submit" display="Login" attrs="" id="uuid-CA005FF8-4D5B-11F1-9AFC-571AF9248A5F" key="submit"/>
  </form>
</response>