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="E754E9BE-4F10-11F1-933A-C5191BBD9EFC" method="post" key="login" encoding="&#x2713;" uri="">
    <field name="username" key="username" value="" widget="text" attrs="" id="uuid-E7551F10-4F10-11F1-933A-C5191BBD9EFC" display="Username"/>
    <field display="Password" id="uuid-E7556998-4F10-11F1-933A-C5191BBD9EFC" widget="password" attrs="" key="password" name="password"/>
    <field widget="submit" attrs="" id="uuid-E755B3EE-4F10-11F1-933A-C5191BBD9EFC" display="Login" value="" key="submit" name="submit"/>
  </form>
</response>