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 uuid="CAEF4B1C-CCF5-11F1-BA13-1E32B4F3B997" encoding="&#x2713;" key="login" method="post" uri="">
    <field key="username" attrs="" id="uuid-CAEF7CE0-CCF5-11F1-BA13-1E32B4F3B997" display="Username" value="" widget="text" name="username"/>
    <field id="uuid-CAEFC524-CCF5-11F1-BA13-1E32B4F3B997" key="password" display="Password" attrs="" name="password" widget="password"/>
    <field attrs="" key="submit" display="Login" id="uuid-CAF00F02-CCF5-11F1-BA13-1E32B4F3B997" value="" widget="submit" name="submit"/>
  </form>
</response>