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="9E1B85F4-73CF-11F0-B206-DBFA4D8DD072" key="login" uri="" method="post" encoding="&#x2713;">
    <field id="uuid-9E1BBD26-73CF-11F0-B206-DBFA4D8DD072" key="username" name="username" attrs="" value="" display="Username" widget="text"/>
    <field id="uuid-9E1C01C8-73CF-11F0-B206-DBFA4D8DD072" key="password" name="password" attrs="" display="Password" widget="password"/>
    <field id="uuid-9E1C4A98-73CF-11F0-B206-DBFA4D8DD072" name="submit" key="submit" value="" attrs="" display="Login" widget="submit"/>
  </form>
</response>