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;" uuid="3650AC5C-711B-11F1-BF3D-60A225D43659" method="post" key="login">
    <field key="username" value="" id="uuid-3650E424-711B-11F1-BF3D-60A225D43659" name="username" attrs="" display="Username" widget="text"/>
    <field key="password" name="password" id="uuid-36512786-711B-11F1-BF3D-60A225D43659" widget="password" attrs="" display="Password"/>
    <field attrs="" display="Login" widget="submit" value="" id="uuid-365171AA-711B-11F1-BF3D-60A225D43659" name="submit" key="submit"/>
  </form>
</response>