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="ED7D3C18-C68B-11F1-AFB0-97C1FD48BEF4" encoding="&#x2713;" method="post" uri="" key="login">
    <field name="username" display="Username" key="username" value="" attrs="" widget="text" id="uuid-ED7D7200-C68B-11F1-AFB0-97C1FD48BEF4"/>
    <field attrs="" id="uuid-ED7DBD64-C68B-11F1-AFB0-97C1FD48BEF4" widget="password" name="password" display="Password" key="password"/>
    <field key="submit" value="" display="Login" name="submit" id="uuid-ED7E083C-C68B-11F1-AFB0-97C1FD48BEF4" widget="submit" attrs=""/>
  </form>
</response>