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="" encoding="&#x2713;" uuid="9714A05C-279C-11F1-9B71-0C44C27BCFD7" method="post" key="login">
    <field name="username" attrs="" id="uuid-9714D0B8-279C-11F1-9B71-0C44C27BCFD7" display="Username" key="username" widget="text" value=""/>
    <field name="password" attrs="" id="uuid-971519C4-279C-11F1-9B71-0C44C27BCFD7" display="Password" key="password" widget="password"/>
    <field attrs="" name="submit" display="Login" id="uuid-97156302-279C-11F1-9B71-0C44C27BCFD7" key="submit" value="" widget="submit"/>
  </form>
</response>