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 encoding="&#x2713;" method="post" uuid="85784EFE-923A-11F0-8FFC-70F554FD9ABD" uri="" key="login">
    <field value="" id="uuid-8578827A-923A-11F0-8FFC-70F554FD9ABD" display="Username" key="username" attrs="" name="username" widget="text"/>
    <field display="Password" id="uuid-8578C9C4-923A-11F0-8FFC-70F554FD9ABD" key="password" name="password" widget="password" attrs=""/>
    <field display="Login" id="uuid-8579133E-923A-11F0-8FFC-70F554FD9ABD" value="" name="submit" widget="submit" attrs="" key="submit"/>
  </form>
</response>