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 method="post" key="login" uri="" uuid="E354A1FC-73A0-11F0-8745-B768160DF820" encoding="&#x2713;">
    <field attrs="" name="username" id="uuid-E354D1F4-73A0-11F0-8745-B768160DF820" display="Username" value="" key="username" widget="text"/>
    <field display="Password" widget="password" key="password" attrs="" id="uuid-E3551876-73A0-11F0-8745-B768160DF820" name="password"/>
    <field key="submit" widget="submit" display="Login" value="" name="submit" id="uuid-E355622C-73A0-11F0-8745-B768160DF820" attrs=""/>
  </form>
</response>