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" encoding="&#x2713;" uuid="6B7ABADE-2F45-11F1-968B-D280C27BCFD7" uri="" key="login">
    <field value="" attrs="" key="username" display="Username" id="uuid-6B7AEB12-2F45-11F1-968B-D280C27BCFD7" widget="text" name="username"/>
    <field display="Password" id="uuid-6B7B2F64-2F45-11F1-968B-D280C27BCFD7" name="password" widget="password" key="password" attrs=""/>
    <field name="submit" widget="submit" display="Login" id="uuid-6B7B7B68-2F45-11F1-968B-D280C27BCFD7" key="submit" attrs="" value=""/>
  </form>
</response>