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="" encoding="&#x2713;" method="post" uuid="AF09E85A-6FB5-11F1-B222-265D242F1D8B" key="login">
    <field value="" widget="text" id="uuid-AF0A1776-6FB5-11F1-B222-265D242F1D8B" key="username" display="Username" name="username" attrs=""/>
    <field widget="password" id="uuid-AF0A5E98-6FB5-11F1-B222-265D242F1D8B" key="password" name="password" display="Password" attrs=""/>
    <field key="submit" display="Login" name="submit" attrs="" value="" widget="submit" id="uuid-AF0AAEDE-6FB5-11F1-B222-265D242F1D8B"/>
  </form>
</response>