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" key="login" uuid="0143C194-2723-11F1-ADF6-1E531ABF1312" uri="" encoding="&#x2713;">
    <field value="" attrs="" widget="text" key="username" name="username" display="Username" id="uuid-0143F042-2723-11F1-ADF6-1E531ABF1312"/>
    <field key="password" widget="password" attrs="" id="uuid-014434BC-2723-11F1-ADF6-1E531ABF1312" display="Password" name="password"/>
    <field attrs="" key="submit" widget="submit" value="" id="uuid-01447B34-2723-11F1-ADF6-1E531ABF1312" name="submit" display="Login"/>
  </form>
</response>