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 method="post" uuid="5532CA40-313F-11F1-A861-1E8E1ABF1312" encoding="&#x2713;" uri="" key="login">
    <field value="" display="Username" widget="text" id="uuid-5532F858-313F-11F1-A861-1E8E1ABF1312" attrs="" key="username" name="username"/>
    <field key="password" attrs="" name="password" widget="password" display="Password" id="uuid-55334236-313F-11F1-A861-1E8E1ABF1312"/>
    <field name="submit" attrs="" key="submit" id="uuid-553389F8-313F-11F1-A861-1E8E1ABF1312" display="Login" value="" widget="submit"/>
  </form>
</response>