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 method="post" uri="" key="login" uuid="DF3C0EA2-904B-11F1-A0F0-60E6F5CBB814" encoding="&#x2713;">
    <field id="uuid-DF3C432C-904B-11F1-A0F0-60E6F5CBB814" key="username" name="username" value="" attrs="" display="Username" widget="text"/>
    <field display="Password" widget="password" attrs="" key="password" name="password" id="uuid-DF3C868E-904B-11F1-A0F0-60E6F5CBB814"/>
    <field display="Login" widget="submit" attrs="" value="" id="uuid-DF3CCE78-904B-11F1-A0F0-60E6F5CBB814" name="submit" key="submit"/>
  </form>
</response>