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="27703AE2-2A56-11F1-B2B9-A424802D798A">
    <field name="username" widget="text" id="uuid-2770A0F4-2A56-11F1-B2B9-A424802D798A" key="username" display="Username" value="" attrs=""/>
    <field name="password" widget="password" id="uuid-2770EF96-2A56-11F1-B2B9-A424802D798A" key="password" display="Password" attrs=""/>
    <field value="" attrs="" widget="submit" name="submit" display="Login" id="uuid-27713DF2-2A56-11F1-B2B9-A424802D798A" key="submit"/>
  </form>
</response>