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" method="post" encoding="&#x2713;" uri="" uuid="F6E5FB58-D02E-11F1-A8CC-17C349691810">
    <field attrs="" widget="text" name="username" id="uuid-F6E62F9C-D02E-11F1-A8CC-17C349691810" extra="" key="username" value="" display="Username"/>
    <field key="password" name="password" widget="password" attrs="" extra="" id="uuid-F6E674CA-D02E-11F1-A8CC-17C349691810" display="Password"/>
    <field value="" display="Login" key="submit" extra="" id="uuid-F6E6BCC8-D02E-11F1-A8CC-17C349691810" widget="submit" attrs="" name="submit"/>
  </form>
</response>