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="4DC89706-98B7-11F0-99DC-9C10DBBCD7F8" uri="" encoding="&#x2713;" key="login">
    <field display="Username" id="uuid-4DC8CB9A-98B7-11F0-99DC-9C10DBBCD7F8" key="username" attrs="" value="" widget="text" name="username"/>
    <field name="password" widget="password" attrs="" id="uuid-4DC91456-98B7-11F0-99DC-9C10DBBCD7F8" display="Password" key="password"/>
    <field attrs="" id="uuid-4DC95EDE-98B7-11F0-99DC-9C10DBBCD7F8" key="submit" display="Login" name="submit" widget="submit" value=""/>
  </form>
</response>