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" uuid="25C09E90-CCE4-11F1-A53A-FDBD8D6E13F8" uri="" method="post" encoding="&#x2713;">
    <field key="username" widget="text" name="username" id="uuid-25C0D5FE-CCE4-11F1-A53A-FDBD8D6E13F8" value="" attrs="" display="Username"/>
    <field widget="password" key="password" display="Password" attrs="" name="password" id="uuid-25C11FC8-CCE4-11F1-A53A-FDBD8D6E13F8"/>
    <field id="uuid-25C169A6-CCE4-11F1-A53A-FDBD8D6E13F8" value="" name="submit" display="Login" attrs="" key="submit" widget="submit"/>
  </form>
</response>