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="49D3E47E-796D-11F1-B90F-74C025D43659" method="post" uri="" key="login">
    <field widget="text" value="" key="username" name="username" id="uuid-49D41B10-796D-11F1-B90F-74C025D43659" display="Username" attrs=""/>
    <field key="password" display="Password" attrs="" id="uuid-49D46156-796D-11F1-B90F-74C025D43659" name="password" widget="password"/>
    <field widget="submit" value="" key="submit" name="submit" id="uuid-49D4AA6C-796D-11F1-B90F-74C025D43659" display="Login" attrs=""/>
  </form>
</response>