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" method="post" uri="" uuid="CE47755C-939B-11F1-9007-B32C898B97BA" encoding="&#x2713;">
    <field widget="text" name="username" key="username" value="" attrs="" display="Username" id="uuid-CE47A7CA-939B-11F1-9007-B32C898B97BA"/>
    <field widget="password" name="password" key="password" display="Password" attrs="" id="uuid-CE47EC8A-939B-11F1-9007-B32C898B97BA"/>
    <field name="submit" widget="submit" id="uuid-CE483820-939B-11F1-9007-B32C898B97BA" value="" display="Login" attrs="" key="submit"/>
  </form>
</response>