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="0BDEDC0A-7472-11F1-AE78-0B09242F1D8B" encoding="&#x2713;" key="login" method="post" uri="">
    <field name="username" widget="text" key="username" value="" attrs="" display="Username" id="uuid-0BDF1968-7472-11F1-AE78-0B09242F1D8B"/>
    <field attrs="" display="Password" key="password" widget="password" name="password" id="uuid-0BDF6544-7472-11F1-AE78-0B09242F1D8B"/>
    <field id="uuid-0BDFB364-7472-11F1-AE78-0B09242F1D8B" key="submit" value="" attrs="" display="Login" name="submit" widget="submit"/>
  </form>
</response>