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="035C2CD6-4709-11F1-BE61-97A625D43659" key="login" uri="" encoding="&#x2713;" method="post">
    <field key="username" attrs="" widget="text" name="username" id="uuid-035C6796-4709-11F1-BE61-97A625D43659" value="" display="Username"/>
    <field key="password" attrs="" widget="password" name="password" id="uuid-035CB520-4709-11F1-BE61-97A625D43659" display="Password"/>
    <field value="" display="Login" name="submit" id="uuid-035D0390-4709-11F1-BE61-97A625D43659" widget="submit" key="submit" attrs=""/>
  </form>
</response>