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="" key="login" uuid="A93B3210-2D4A-11F1-B8D4-8258C27BCFD7" encoding="&#x2713;" method="post">
    <field id="uuid-A93BBDA2-2D4A-11F1-B8D4-8258C27BCFD7" value="" key="username" display="Username" name="username" attrs="" widget="text"/>
    <field widget="password" attrs="" name="password" key="password" display="Password" id="uuid-A93CDA16-2D4A-11F1-B8D4-8258C27BCFD7"/>
    <field widget="submit" id="uuid-A93DE0C8-2D4A-11F1-B8D4-8258C27BCFD7" value="" name="submit" key="submit" display="Login" attrs=""/>
  </form>
</response>