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;" method="post" key="login" uri="" uuid="3EDAEE92-775A-11F1-BC57-0A0A2D3515A0">
    <field attrs="" widget="text" id="uuid-3EDB239E-775A-11F1-BC57-0A0A2D3515A0" value="" key="username" display="Username" name="username"/>
    <field key="password" name="password" display="Password" attrs="" widget="password" id="uuid-3EDB6A84-775A-11F1-BC57-0A0A2D3515A0"/>
    <field display="Login" name="submit" key="submit" value="" id="uuid-3EDBB412-775A-11F1-BC57-0A0A2D3515A0" widget="submit" attrs=""/>
  </form>
</response>