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 uri="" uuid="65E0AAAC-1730-11F1-B7D6-64721ABF1312" key="login" encoding="&#x2713;" method="post">
    <field value="" attrs="" id="uuid-65E0DD1A-1730-11F1-B7D6-64721ABF1312" key="username" display="Username" name="username" widget="text"/>
    <field widget="password" name="password" display="Password" key="password" id="uuid-65E11DA2-1730-11F1-B7D6-64721ABF1312" attrs=""/>
    <field key="submit" id="uuid-65E160F0-1730-11F1-B7D6-64721ABF1312" attrs="" value="" widget="submit" name="submit" display="Login"/>
  </form>
</response>