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="5A8D3FE4-8440-11F1-AFF7-F5747BD1CDC2" method="post" uri="" encoding="&#x2713;" key="login">
    <field id="uuid-5A8D764E-8440-11F1-AFF7-F5747BD1CDC2" value="" key="username" display="Username" name="username" attrs="" widget="text"/>
    <field attrs="" widget="password" id="uuid-5A8DC27A-8440-11F1-AFF7-F5747BD1CDC2" key="password" name="password" display="Password"/>
    <field id="uuid-5A8E0FBE-8440-11F1-AFF7-F5747BD1CDC2" value="" key="submit" name="submit" display="Login" widget="submit" attrs=""/>
  </form>
</response>