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="" encoding="&#x2713;" uuid="75636C4E-6B40-11F1-948E-755D242F1D8B">
    <field value="" display="Username" attrs="" name="username" key="username" widget="text" id="uuid-7563A196-6B40-11F1-948E-755D242F1D8B"/>
    <field id="uuid-7563E02A-6B40-11F1-948E-755D242F1D8B" widget="password" key="password" name="password" display="Password" attrs=""/>
    <field attrs="" display="Login" value="" widget="submit" id="uuid-756421FC-6B40-11F1-948E-755D242F1D8B" name="submit" key="submit"/>
  </form>
</response>