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="CB970816-75D4-11F1-BA58-81DDF8248A5F" encoding="&#x2713;" key="login" method="post" uri="">
    <field value="" display="Username" attrs="" id="uuid-CB973C50-75D4-11F1-BA58-81DDF8248A5F" key="username" widget="text" name="username"/>
    <field display="Password" name="password" widget="password" key="password" id="uuid-CB978020-75D4-11F1-BA58-81DDF8248A5F" attrs=""/>
    <field name="submit" widget="submit" key="submit" id="uuid-CB97CC24-75D4-11F1-BA58-81DDF8248A5F" attrs="" display="Login" value=""/>
  </form>
</response>