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 key="login" encoding="&#x2713;" uuid="02FA0B48-93F1-11F1-A096-7FDEF5CBB814" uri="" method="post">
    <field value="" attrs="" display="Username" widget="text" name="username" key="username" id="uuid-02FA3B18-93F1-11F1-A096-7FDEF5CBB814"/>
    <field key="password" name="password" id="uuid-02FA833E-93F1-11F1-A096-7FDEF5CBB814" attrs="" widget="password" display="Password"/>
    <field value="" widget="submit" display="Login" attrs="" id="uuid-02FAD06E-93F1-11F1-A096-7FDEF5CBB814" key="submit" name="submit"/>
  </form>
</response>