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" uri="" encoding="&#x2713;" method="post" uuid="CD660B66-2669-11F1-9E1A-B98A1ABF1312">
    <field attrs="" widget="text" key="username" value="" name="username" id="uuid-CD663ABE-2669-11F1-9E1A-B98A1ABF1312" display="Username"/>
    <field attrs="" widget="password" name="password" id="uuid-CD6684E2-2669-11F1-9E1A-B98A1ABF1312" key="password" display="Password"/>
    <field display="Login" id="uuid-CD66CC18-2669-11F1-9E1A-B98A1ABF1312" key="submit" value="" name="submit" widget="submit" attrs=""/>
  </form>
</response>