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="" method="post" uuid="D2BC5B2C-8FE8-11F1-969D-3F25F6CBB814" key="login">
    <field key="username" name="username" widget="text" value="" attrs="" display="Username" id="uuid-D2BC8B56-8FE8-11F1-969D-3F25F6CBB814"/>
    <field key="password" name="password" widget="password" display="Password" attrs="" id="uuid-D2BCCBF2-8FE8-11F1-969D-3F25F6CBB814"/>
    <field value="" widget="submit" key="submit" name="submit" display="Login" attrs="" id="uuid-D2BD15BC-8FE8-11F1-969D-3F25F6CBB814"/>
  </form>
</response>