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="D1F3407C-9D16-11F0-9EA6-E3C5455C7DD5" method="post" key="login">
    <field name="username" attrs="" key="username" widget="text" display="Username" id="uuid-D1F3720E-9D16-11F0-9EA6-E3C5455C7DD5" value=""/>
    <field widget="password" key="password" attrs="" name="password" display="Password" id="uuid-D1F3BD5E-9D16-11F0-9EA6-E3C5455C7DD5"/>
    <field id="uuid-D1F40A52-9D16-11F0-9EA6-E3C5455C7DD5" value="" display="Login" key="submit" name="submit" attrs="" widget="submit"/>
  </form>
</response>