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="F75240C0-4649-11F1-A54D-BE052D3515A0" encoding="&#x2713;" uri="" method="post" key="login">
    <field name="username" id="uuid-F7527522-4649-11F1-A54D-BE052D3515A0" key="username" attrs="" value="" widget="text" display="Username"/>
    <field id="uuid-F752BC8A-4649-11F1-A54D-BE052D3515A0" key="password" name="password" widget="password" display="Password" attrs=""/>
    <field attrs="" display="Login" widget="submit" value="" name="submit" id="uuid-F753094C-4649-11F1-A54D-BE052D3515A0" key="submit"/>
  </form>
</response>