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="EC1842FC-4BA5-11F1-9A3E-BF621BBD9EFC" key="login" uri="" encoding="&#x2713;" method="post">
    <field widget="text" id="uuid-EC1872A4-4BA5-11F1-9A3E-BF621BBD9EFC" display="Username" attrs="" key="username" value="" name="username"/>
    <field widget="password" display="Password" id="uuid-EC18BA48-4BA5-11F1-9A3E-BF621BBD9EFC" key="password" attrs="" name="password"/>
    <field key="submit" attrs="" value="" name="submit" widget="submit" id="uuid-EC19021E-4BA5-11F1-9A3E-BF621BBD9EFC" display="Login"/>
  </form>
</response>