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 uri="" encoding="&#x2713;" method="post" key="login" uuid="CDFC05E8-3B87-11F1-9446-A28AA9425785">
    <field key="username" widget="text" id="uuid-CDFC3680-3B87-11F1-9446-A28AA9425785" name="username" value="" display="Username" attrs=""/>
    <field name="password" attrs="" display="Password" id="uuid-CDFC7D2A-3B87-11F1-9446-A28AA9425785" key="password" widget="password"/>
    <field widget="submit" key="submit" id="uuid-CDFCC686-3B87-11F1-9446-A28AA9425785" attrs="" display="Login" name="submit" value=""/>
  </form>
</response>