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="F1553D54-CF41-11F1-AA0D-DF20B4F3B997" method="post" encoding="&#x2713;" key="login" uri="">
    <field value="" display="Username" id="uuid-F1556C16-CF41-11F1-AA0D-DF20B4F3B997" key="username" attrs="" widget="text" extra="" name="username"/>
    <field display="Password" key="password" attrs="" id="uuid-F155B450-CF41-11F1-AA0D-DF20B4F3B997" extra="" widget="password" name="password"/>
    <field name="submit" extra="" widget="submit" key="submit" id="uuid-F155FEBA-CF41-11F1-AA0D-DF20B4F3B997" attrs="" display="Login" value=""/>
  </form>
</response>