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 encoding="&#x2713;" uuid="259904B2-6C85-11F1-9921-6C3E242F1D8B" method="post" uri="" key="login">
    <field value="" display="Username" attrs="" key="username" name="username" id="uuid-25993C84-6C85-11F1-9921-6C3E242F1D8B" widget="text"/>
    <field display="Password" attrs="" id="uuid-2599831A-6C85-11F1-9921-6C3E242F1D8B" widget="password" key="password" name="password"/>
    <field display="Login" attrs="" value="" id="uuid-2599D194-6C85-11F1-9921-6C3E242F1D8B" widget="submit" key="submit" name="submit"/>
  </form>
</response>