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="" method="post" uuid="EB81D0D4-8E89-11F1-9D5F-AABBF5CBB814" key="login" encoding="&#x2713;">
    <field value="" widget="text" key="username" name="username" display="Username" attrs="" id="uuid-EB8206C6-8E89-11F1-9D5F-AABBF5CBB814"/>
    <field id="uuid-EB8249F6-8E89-11F1-9D5F-AABBF5CBB814" attrs="" display="Password" widget="password" name="password" key="password"/>
    <field id="uuid-EB8291CC-8E89-11F1-9D5F-AABBF5CBB814" attrs="" display="Login" name="submit" key="submit" widget="submit" value=""/>
  </form>
</response>