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 key="login" method="post" uri="" encoding="&#x2713;" uuid="59B4F6C2-922C-11F0-8070-7428DBBCD7F8">
    <field name="username" value="" id="uuid-59B5683C-922C-11F0-B3C9-7428DBBCD7F8" key="username" widget="text" attrs="" display="Username"/>
    <field display="Password" attrs="" widget="password" key="password" id="uuid-59B5DCC2-922C-11F0-B3C9-7428DBBCD7F8" name="password"/>
    <field name="submit" attrs="" display="Login" widget="submit" value="" id="uuid-59B60ADA-922C-11F0-A1FE-7428DBBCD7F8" key="submit"/>
  </form>
</response>