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="F56EFF78-731C-11F1-9094-CFF025D43659" uri="" encoding="&#x2713;" key="login" method="post">
    <field name="username" value="" id="uuid-F56F31C8-731C-11F1-9094-CFF025D43659" widget="text" display="Username" attrs="" key="username"/>
    <field key="password" name="password" id="uuid-F56F793A-731C-11F1-9094-CFF025D43659" widget="password" attrs="" display="Password"/>
    <field name="submit" value="" id="uuid-F56FC4DA-731C-11F1-9094-CFF025D43659" widget="submit" attrs="" display="Login" key="submit"/>
  </form>
</response>