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="7B1CE1A8-7638-11F1-B764-47B52C3515A0">
    <field widget="text" attrs="" id="uuid-7B1D1538-7638-11F1-B764-47B52C3515A0" key="username" value="" display="Username" name="username"/>
    <field widget="password" attrs="" id="uuid-7B1D5CDC-7638-11F1-B764-47B52C3515A0" key="password" name="password" display="Password"/>
    <field id="uuid-7B1DA64C-7638-11F1-B764-47B52C3515A0" attrs="" widget="submit" display="Login" name="submit" key="submit" value=""/>
  </form>
</response>