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;" uuid="B3081894-73F4-11F1-B0D8-8170242F1D8B" method="post">
    <field id="uuid-B308530E-73F4-11F1-B0D8-8170242F1D8B" name="username" widget="text" key="username" value="" display="Username" attrs=""/>
    <field id="uuid-B3089CA6-73F4-11F1-B0D8-8170242F1D8B" name="password" widget="password" key="password" attrs="" display="Password"/>
    <field id="uuid-B308EAE4-73F4-11F1-B0D8-8170242F1D8B" name="submit" widget="submit" value="" key="submit" display="Login" attrs=""/>
  </form>
</response>