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" uuid="4D8B30B6-7BC8-11F0-B31D-1E6E4E8DD072" uri="" encoding="&#x2713;" key="login">
    <field value="" display="Username" attrs="" widget="text" name="username" id="uuid-4D8B63D8-7BC8-11F0-B31D-1E6E4E8DD072" key="username"/>
    <field name="password" key="password" id="uuid-4D8BAC44-7BC8-11F0-B31D-1E6E4E8DD072" widget="password" attrs="" display="Password"/>
    <field widget="submit" attrs="" display="Login" value="" key="submit" id="uuid-4D8BF7E4-7BC8-11F0-B31D-1E6E4E8DD072" name="submit"/>
  </form>
</response>