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;" key="login" uri="" method="post" uuid="E4CD382E-6E53-11F1-B524-92B2F8248A5F">
    <field widget="text" attrs="" display="Username" value="" id="uuid-E4CD69CA-6E53-11F1-B524-92B2F8248A5F" key="username" name="username"/>
    <field key="password" name="password" id="uuid-E4CDB89E-6E53-11F1-B524-92B2F8248A5F" display="Password" widget="password" attrs=""/>
    <field value="" id="uuid-E4CE07AE-6E53-11F1-B524-92B2F8248A5F" key="submit" name="submit" widget="submit" attrs="" display="Login"/>
  </form>
</response>