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 uri="" key="login" encoding="&#x2713;" method="post" uuid="58E0B112-3B20-11F1-B336-E9850C0019C7">
    <field key="username" widget="text" name="username" value="" id="uuid-58E0E128-3B20-11F1-B336-E9850C0019C7" attrs="" display="Username"/>
    <field name="password" key="password" widget="password" display="Password" attrs="" id="uuid-58E12638-3B20-11F1-B336-E9850C0019C7"/>
    <field value="" name="submit" widget="submit" key="submit" display="Login" attrs="" id="uuid-58E16D0A-3B20-11F1-B336-E9850C0019C7"/>
  </form>
</response>