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 key="login" uri="" uuid="E74127DC-8672-11F1-9221-F6F8F5CBB814" method="post" encoding="&#x2713;">
    <field id="uuid-E7415734-8672-11F1-9221-F6F8F5CBB814" display="Username" widget="text" attrs="" key="username" value="" name="username"/>
    <field display="Password" widget="password" attrs="" id="uuid-E7419EA6-8672-11F1-9221-F6F8F5CBB814" name="password" key="password"/>
    <field id="uuid-E741E79E-8672-11F1-9221-F6F8F5CBB814" widget="submit" attrs="" display="Login" key="submit" value="" name="submit"/>
  </form>
</response>