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 uuid="57FBFCF4-482A-11F1-A048-EC828F49F76F" uri="" key="login" encoding="&#x2713;" method="post">
    <field key="username" attrs="" display="Username" widget="text" value="" name="username" id="uuid-57FC2CEC-482A-11F1-A048-EC828F49F76F"/>
    <field attrs="" display="Password" key="password" name="password" id="uuid-57FC77CE-482A-11F1-A048-EC828F49F76F" widget="password"/>
    <field id="uuid-57FCC224-482A-11F1-A048-EC828F49F76F" name="submit" value="" widget="submit" display="Login" attrs="" key="submit"/>
  </form>
</response>