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 uuid="D7A9537C-2186-11F1-A5C3-E8880C0019C7" method="post" encoding="&#x2713;" key="login" uri="">
    <field attrs="" display="Username" name="username" value="" widget="text" id="uuid-D7A983A6-2186-11F1-A5C3-E8880C0019C7" key="username"/>
    <field widget="password" attrs="" display="Password" name="password" id="uuid-D7A9C9E2-2186-11F1-A5C3-E8880C0019C7" key="password"/>
    <field key="submit" id="uuid-D7AA14CE-2186-11F1-A5C3-E8880C0019C7" name="submit" display="Login" attrs="" value="" widget="submit"/>
  </form>
</response>