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="" encoding="&#x2713;" method="post" key="login" uuid="A84A0A58-C8D5-11F1-A640-26E849691810">
    <field display="Username" key="username" widget="text" attrs="" value="" name="username" id="uuid-A84A3C26-C8D5-11F1-A640-26E849691810"/>
    <field id="uuid-A84A8AA0-C8D5-11F1-A640-26E849691810" name="password" attrs="" display="Password" widget="password" key="password"/>
    <field key="submit" widget="submit" display="Login" attrs="" value="" name="submit" id="uuid-A84ADA50-C8D5-11F1-A640-26E849691810"/>
  </form>
</response>