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 method="post" encoding="&#x2713;" uuid="A9D45454-910E-11F1-A0BD-36F125D43659" uri="" key="login">
    <field key="username" widget="text" value="" id="uuid-A9D48D98-910E-11F1-A0BD-36F125D43659" display="Username" attrs="" name="username"/>
    <field id="uuid-A9D4D3D4-910E-11F1-A0BD-36F125D43659" display="Password" name="password" attrs="" key="password" widget="password"/>
    <field key="submit" widget="submit" value="" id="uuid-A9D51AD8-910E-11F1-A0BD-36F125D43659" attrs="" name="submit" display="Login"/>
  </form>
</response>