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="" key="login" method="post" encoding="&#x2713;" uuid="8E17C11E-9354-11F0-A8EF-D706DBBCD7F8">
    <field name="username" key="username" value="" attrs="" display="Username" widget="text" id="uuid-8E17F652-9354-11F0-A8EF-D706DBBCD7F8"/>
    <field key="password" name="password" attrs="" display="Password" id="uuid-8E183F4A-9354-11F0-A8EF-D706DBBCD7F8" widget="password"/>
    <field attrs="" name="submit" value="" key="submit" id="uuid-8E188B12-9354-11F0-A8EF-D706DBBCD7F8" widget="submit" display="Login"/>
  </form>
</response>