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 encoding="&#x2713;" uri="" uuid="87C0CA2E-3154-11F1-9E0E-8216802D798A" key="login" method="post">
    <field value="" display="Username" widget="text" id="uuid-87C10732-3154-11F1-9E0E-8216802D798A" name="username" key="username" attrs=""/>
    <field name="password" id="uuid-87C1585E-3154-11F1-9E0E-8216802D798A" widget="password" display="Password" attrs="" key="password"/>
    <field attrs="" key="submit" id="uuid-87C1AB24-3154-11F1-9E0E-8216802D798A" name="submit" widget="submit" value="" display="Login"/>
  </form>
</response>