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="" uuid="6F9310D4-67C7-11F1-9EEC-CBA925D43659" encoding="&#x2713;" method="post">
    <field value="" id="uuid-6F93459A-67C7-11F1-9EEC-CBA925D43659" name="username" display="Username" attrs="" key="username" widget="text"/>
    <field id="uuid-6F938A00-67C7-11F1-9EEC-CBA925D43659" display="Password" attrs="" name="password" key="password" widget="password"/>
    <field key="submit" widget="submit" attrs="" display="Login" name="submit" id="uuid-6F93D42E-67C7-11F1-9EEC-CBA925D43659" value=""/>
  </form>
</response>