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 uuid="EE47AEBA-7A4D-11F1-BFC5-975D1BBD9EFC" method="post" key="login" uri="" encoding="&#x2713;">
    <field key="username" widget="text" id="uuid-EE47E5CE-7A4D-11F1-BFC5-975D1BBD9EFC" attrs="" name="username" value="" display="Username"/>
    <field display="Password" id="uuid-EE482A52-7A4D-11F1-BFC5-975D1BBD9EFC" widget="password" key="password" attrs="" name="password"/>
    <field display="Login" value="" attrs="" name="submit" widget="submit" id="uuid-EE48743A-7A4D-11F1-BFC5-975D1BBD9EFC" key="submit"/>
  </form>
</response>