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="7A3C51C8-6807-11F0-9F2E-B77162E0087B" method="post" encoding="&#x2713;" uri="" key="login">
    <field attrs="" widget="text" value="" id="uuid-7A3C85E4-6807-11F0-9F2E-B77162E0087B" display="Username" name="username" key="username"/>
    <field name="password" key="password" display="Password" id="uuid-7A3CCD2E-6807-11F0-9F2E-B77162E0087B" widget="password" attrs=""/>
    <field value="" id="uuid-7A3D1B08-6807-11F0-9F2E-B77162E0087B" attrs="" widget="submit" name="submit" key="submit" display="Login"/>
  </form>
</response>