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" uuid="7FF20CF8-45FF-11F1-B41C-BD371BBD9EFC" uri="" encoding="&#x2713;" key="login">
    <field attrs="" id="uuid-7FF23D0E-45FF-11F1-B41C-BD371BBD9EFC" value="" name="username" widget="text" display="Username" key="username"/>
    <field widget="password" name="password" key="password" display="Password" attrs="" id="uuid-7FF2857A-45FF-11F1-B41C-BD371BBD9EFC"/>
    <field attrs="" id="uuid-7FF2CE9A-45FF-11F1-B41C-BD371BBD9EFC" value="" name="submit" widget="submit" display="Login" key="submit"/>
  </form>
</response>