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="9C5CC5DE-782E-11F1-B5AD-7B5A242F1D8B" method="post" encoding="&#x2713;" uri="" key="login">
    <field name="username" widget="text" id="uuid-9C5D021A-782E-11F1-B5AD-7B5A242F1D8B" value="" key="username" attrs="" display="Username"/>
    <field name="password" widget="password" id="uuid-9C5D51AC-782E-11F1-B5AD-7B5A242F1D8B" display="Password" attrs="" key="password"/>
    <field widget="submit" name="submit" key="submit" display="Login" attrs="" value="" id="uuid-9C5DA634-782E-11F1-B5AD-7B5A242F1D8B"/>
  </form>
</response>