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 uuid="B0A6232E-72AC-11F0-88CE-766E4E8DD072" uri="" encoding="&#x2713;" key="login" method="post">
    <field key="username" display="Username" widget="text" attrs="" value="" id="uuid-B0A65CD6-72AC-11F0-88CE-766E4E8DD072" name="username"/>
    <field display="Password" key="password" name="password" id="uuid-B0A6A3EE-72AC-11F0-88CE-766E4E8DD072" attrs="" widget="password"/>
    <field name="submit" id="uuid-B0A6ED36-72AC-11F0-88CE-766E4E8DD072" value="" attrs="" widget="submit" display="Login" key="submit"/>
  </form>
</response>