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="E8FE22E8-4494-11F1-B59B-C4E8F8248A5F" uri="" method="post" key="login" encoding="&#x2713;">
    <field key="username" widget="text" attrs="" display="Username" value="" id="uuid-E8FE5678-4494-11F1-B59B-C4E8F8248A5F" name="username"/>
    <field name="password" id="uuid-E8FE9E1C-4494-11F1-B59B-C4E8F8248A5F" key="password" attrs="" display="Password" widget="password"/>
    <field key="submit" widget="submit" attrs="" display="Login" value="" name="submit" id="uuid-E8FEE3EA-4494-11F1-B59B-C4E8F8248A5F"/>
  </form>
</response>