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 method="post" key="login" uuid="90839BF8-8DE0-11F1-B8C3-5974898B97BA" encoding="&#x2713;" uri="">
    <field widget="text" key="username" name="username" attrs="" value="" display="Username" id="uuid-9083CF38-8DE0-11F1-B8C3-5974898B97BA"/>
    <field widget="password" key="password" name="password" attrs="" id="uuid-90841C4A-8DE0-11F1-B8C3-5974898B97BA" display="Password"/>
    <field id="uuid-90846920-8DE0-11F1-B8C3-5974898B97BA" value="" display="Login" attrs="" name="submit" key="submit" widget="submit"/>
  </form>
</response>