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 key="login" uri="" encoding="&#x2713;" uuid="7BDD36D4-794E-11F0-A774-CE104E8DD072" method="post">
    <field name="username" id="uuid-7BDD6992-794E-11F0-A774-CE104E8DD072" key="username" value="" attrs="" display="Username" widget="text"/>
    <field name="password" id="uuid-7BDDABE6-794E-11F0-A774-CE104E8DD072" key="password" attrs="" display="Password" widget="password"/>
    <field name="submit" key="submit" id="uuid-7BDDF48E-794E-11F0-A774-CE104E8DD072" value="" widget="submit" display="Login" attrs=""/>
  </form>
</response>