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="E399B8E6-93E4-11F0-AF65-841F3049FC8C" encoding="&#x2713;" key="login" uri="" method="post">
    <field widget="text" id="uuid-E399ECBC-93E4-11F0-AF65-841F3049FC8C" name="username" value="" display="Username" key="username" attrs=""/>
    <field id="uuid-E39A367C-93E4-11F0-AF65-841F3049FC8C" widget="password" attrs="" key="password" name="password" display="Password"/>
    <field widget="submit" id="uuid-E39A83C0-93E4-11F0-AF65-841F3049FC8C" value="" display="Login" name="submit" attrs="" key="submit"/>
  </form>
</response>