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 uri="" uuid="213FC57C-4F57-11F1-BA75-3CA88F49F76F" key="login" method="post" encoding="&#x2713;">
    <field name="username" display="Username" attrs="" id="uuid-213FF8A8-4F57-11F1-BA75-3CA88F49F76F" widget="text" value="" key="username"/>
    <field display="Password" name="password" id="uuid-21404290-4F57-11F1-BA75-3CA88F49F76F" widget="password" key="password" attrs=""/>
    <field name="submit" display="Login" attrs="" id="uuid-214090A6-4F57-11F1-BA75-3CA88F49F76F" key="submit" widget="submit" value=""/>
  </form>
</response>