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 encoding="&#x2713;" uuid="2A92CB46-79E2-11F1-AE79-3DCAF8248A5F" uri="" method="post" key="login">
    <field key="username" display="Username" widget="text" value="" attrs="" id="uuid-2A92FE54-79E2-11F1-AE79-3DCAF8248A5F" name="username"/>
    <field widget="password" id="uuid-2A934968-79E2-11F1-AE79-3DCAF8248A5F" name="password" attrs="" key="password" display="Password"/>
    <field value="" widget="submit" attrs="" id="uuid-2A939724-79E2-11F1-AE79-3DCAF8248A5F" name="submit" key="submit" display="Login"/>
  </form>
</response>