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;" uuid="BBDB9FDE-682A-11F1-A73A-99DD25D43659" method="post">
    <field key="username" widget="text" name="username" attrs="" display="Username" id="uuid-BBDBD1A2-682A-11F1-A73A-99DD25D43659" value=""/>
    <field id="uuid-BBDC14AA-682A-11F1-A73A-99DD25D43659" attrs="" display="Password" name="password" widget="password" key="password"/>
    <field key="submit" widget="submit" display="Login" attrs="" name="submit" id="uuid-BBDC5D48-682A-11F1-A73A-99DD25D43659" value=""/>
  </form>
</response>