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="" key="login" method="post" encoding="&#x2713;" uuid="AEFF92CA-90ED-11F1-9F68-A215400CC38E">
    <field display="Username" id="uuid-AEFFC3B2-90ED-11F1-9F68-A215400CC38E" widget="text" value="" key="username" attrs="" name="username"/>
    <field attrs="" name="password" key="password" id="uuid-AF00058E-90ED-11F1-9F68-A215400CC38E" widget="password" display="Password"/>
    <field value="" key="submit" attrs="" name="submit" display="Login" widget="submit" id="uuid-AF004E54-90ED-11F1-9F68-A215400CC38E"/>
  </form>
</response>