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;" method="post" uuid="976614F4-7E23-11F1-BAA7-134F1BBD9EFC">
    <field widget="text" name="username" attrs="" value="" key="username" id="uuid-97664546-7E23-11F1-BAA7-134F1BBD9EFC" display="Username"/>
    <field key="password" id="uuid-97668DE4-7E23-11F1-BAA7-134F1BBD9EFC" name="password" widget="password" attrs="" display="Password"/>
    <field display="Login" key="submit" id="uuid-9766D7B8-7E23-11F1-BAA7-134F1BBD9EFC" name="submit" widget="submit" value="" attrs=""/>
  </form>
</response>