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" uri="" uuid="4DD9048A-81A3-11F1-974E-52B18F49F76F" encoding="&#x2713;">
    <field attrs="" id="uuid-4DD93720-81A3-11F1-974E-52B18F49F76F" value="" widget="text" key="username" name="username" display="Username"/>
    <field attrs="" id="uuid-4DD98072-81A3-11F1-974E-52B18F49F76F" name="password" key="password" widget="password" display="Password"/>
    <field display="Login" name="submit" key="submit" value="" widget="submit" id="uuid-4DD9CA96-81A3-11F1-974E-52B18F49F76F" attrs=""/>
  </form>
</response>