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 key="login" uuid="1AE2072E-8168-11F1-94F9-50801BBD9EFC" encoding="&#x2713;" uri="" method="post">
    <field name="username" value="" id="uuid-1AE23C26-8168-11F1-94F9-50801BBD9EFC" attrs="" widget="text" key="username" display="Username"/>
    <field attrs="" id="uuid-1AE283FC-8168-11F1-94F9-50801BBD9EFC" widget="password" name="password" display="Password" key="password"/>
    <field value="" id="uuid-1AE2CD3A-8168-11F1-94F9-50801BBD9EFC" attrs="" widget="submit" name="submit" display="Login" key="submit"/>
  </form>
</response>