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 encoding="&#x2713;" key="login" uuid="56AB4AFC-4B91-11F1-BF0E-EBDBF8248A5F" uri="" method="post">
    <field display="Username" key="username" attrs="" name="username" widget="text" value="" id="uuid-56AB7C52-4B91-11F1-BF0E-EBDBF8248A5F"/>
    <field id="uuid-56ABC0B8-4B91-11F1-BF0E-EBDBF8248A5F" name="password" attrs="" key="password" display="Password" widget="password"/>
    <field value="" id="uuid-56AC079E-4B91-11F1-BF0E-EBDBF8248A5F" name="submit" attrs="" key="submit" display="Login" widget="submit"/>
  </form>
</response>