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" encoding="&#x2713;" method="post" uuid="1C7739F0-29E4-11F1-9C76-4DAA0C0019C7">
    <field key="username" attrs="" display="Username" id="uuid-1C776C18-29E4-11F1-9C76-4DAA0C0019C7" name="username" widget="text" value=""/>
    <field display="Password" key="password" attrs="" id="uuid-1C77B4E8-29E4-11F1-9C76-4DAA0C0019C7" name="password" widget="password"/>
    <field display="Login" attrs="" key="submit" value="" name="submit" id="uuid-1C77FED0-29E4-11F1-9C76-4DAA0C0019C7" widget="submit"/>
  </form>
</response>