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" uuid="F1A4953C-CEEE-11F1-93E2-D962738CD348" uri="" encoding="&#x2713;">
    <field name="username" key="username" value="" widget="text" attrs="" extra="" id="uuid-F1A4C8AE-CEEE-11F1-93E2-D962738CD348" display="Username"/>
    <field extra="" key="password" id="uuid-F1A50530-CEEE-11F1-93E2-D962738CD348" attrs="" name="password" widget="password" display="Password"/>
    <field display="Login" extra="" id="uuid-F1A548A6-CEEE-11F1-93E2-D962738CD348" attrs="" widget="submit" value="" key="submit" name="submit"/>
  </form>
</response>