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" encoding="&#x2713;" uri="" uuid="A7B4C534-480F-11F1-B7A8-B2811BBD9EFC" method="post">
    <field display="Username" widget="text" attrs="" id="uuid-A7B4F95A-480F-11F1-B7A8-B2811BBD9EFC" value="" name="username" key="username"/>
    <field attrs="" id="uuid-A7B54130-480F-11F1-B7A8-B2811BBD9EFC" key="password" name="password" widget="password" display="Password"/>
    <field key="submit" value="" name="submit" id="uuid-A7B58B90-480F-11F1-B7A8-B2811BBD9EFC" attrs="" display="Login" widget="submit"/>
  </form>
</response>