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" uuid="A98E67BE-A2ED-11F1-A75D-A657898B97BA" uri="" method="post" encoding="&#x2713;">
    <field attrs="" id="uuid-A98EBC8C-A2ED-11F1-B637-A657898B97BA" name="username" widget="text" key="username" display="Username" value=""/>
    <field name="password" id="uuid-A98F07BE-A2ED-11F1-B637-A657898B97BA" attrs="" display="Password" key="password" widget="password"/>
    <field key="submit" display="Login" value="" widget="submit" name="submit" id="uuid-A98F3770-A2ED-11F1-AF5C-A657898B97BA" attrs=""/>
  </form>
</response>