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="CC45A45C-8C28-11F0-888A-7FCA54FD9ABD" uri="" method="post" encoding="&#x2713;" key="login">
    <field attrs="" display="Username" name="username" key="username" widget="text" id="uuid-CC45DE54-8C28-11F0-888A-7FCA54FD9ABD" value=""/>
    <field attrs="" name="password" display="Password" id="uuid-CC462B20-8C28-11F0-888A-7FCA54FD9ABD" widget="password" key="password"/>
    <field value="" id="uuid-CC467698-8C28-11F0-888A-7FCA54FD9ABD" widget="submit" key="submit" name="submit" display="Login" attrs=""/>
  </form>
</response>