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 encoding="&#x2713;" uri="" key="login" method="post" uuid="E39683F8-485A-11F1-90B6-AE0F1BBD9EFC">
    <field id="uuid-E396B97C-485A-11F1-90B6-AE0F1BBD9EFC" attrs="" key="username" value="" name="username" widget="text" display="Username"/>
    <field widget="password" display="Password" attrs="" id="uuid-E397021A-485A-11F1-90B6-AE0F1BBD9EFC" name="password" key="password"/>
    <field attrs="" id="uuid-E3974B26-485A-11F1-90B6-AE0F1BBD9EFC" value="" name="submit" key="submit" widget="submit" display="Login"/>
  </form>
</response>