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="105A5DD6-4722-11F1-8AB4-4F2F1BBD9EFC" uri="" method="post" encoding="&#x2713;" key="login">
    <field attrs="" id="uuid-105A8E78-4722-11F1-8AB4-4F2F1BBD9EFC" widget="text" name="username" value="" key="username" display="Username"/>
    <field attrs="" id="uuid-105AD626-4722-11F1-8AB4-4F2F1BBD9EFC" widget="password" name="password" key="password" display="Password"/>
    <field id="uuid-105B21C6-4722-11F1-8AB4-4F2F1BBD9EFC" attrs="" display="Login" key="submit" name="submit" value="" widget="submit"/>
  </form>
</response>