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" uri="" encoding="&#x2713;" uuid="47D4D88E-8D29-11F1-BC66-7213400CC38E" method="post">
    <field value="" key="username" id="uuid-47D50CAA-8D29-11F1-BC66-7213400CC38E" widget="text" attrs="" display="Username" name="username"/>
    <field attrs="" name="password" display="Password" id="uuid-47D55476-8D29-11F1-BC66-7213400CC38E" key="password" widget="password"/>
    <field attrs="" name="submit" display="Login" key="submit" id="uuid-47D59BE8-8D29-11F1-BC66-7213400CC38E" widget="submit" value=""/>
  </form>
</response>