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="EEAB2394-7B04-11F0-B55F-2924B13FE236" method="post" encoding="&#x2713;" uri="" key="login">
    <field attrs="" widget="text" name="username" id="uuid-EEAB542C-7B04-11F0-B55F-2924B13FE236" value="" key="username" display="Username"/>
    <field widget="password" name="password" attrs="" id="uuid-EEAB9BF8-7B04-11F0-B55F-2924B13FE236" key="password" display="Password"/>
    <field name="submit" attrs="" widget="submit" id="uuid-EEABE4DC-7B04-11F0-B55F-2924B13FE236" value="" display="Login" key="submit"/>
  </form>
</response>