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" uri="" encoding="&#x2713;" key="login" uuid="633C17EE-4E8C-11F1-B180-605B1BBD9EFC">
    <field id="uuid-633C4D68-4E8C-11F1-B180-605B1BBD9EFC" value="" widget="text" name="username" key="username" attrs="" display="Username"/>
    <field widget="password" name="password" key="password" display="Password" attrs="" id="uuid-633C9552-4E8C-11F1-B180-605B1BBD9EFC"/>
    <field value="" id="uuid-633CDCC4-4E8C-11F1-B180-605B1BBD9EFC" widget="submit" display="Login" attrs="" key="submit" name="submit"/>
  </form>
</response>