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" uuid="69EAD9B4-3E9B-11F1-B9A5-7F3DC27BCFD7" uri="" encoding="&#x2713;" method="post">
    <field key="username" value="" attrs="" widget="text" id="uuid-69EB0E16-3E9B-11F1-B9A5-7F3DC27BCFD7" display="Username" name="username"/>
    <field attrs="" widget="password" id="uuid-69EB56DC-3E9B-11F1-B9A5-7F3DC27BCFD7" display="Password" name="password" key="password"/>
    <field name="submit" id="uuid-69EBA240-3E9B-11F1-B9A5-7F3DC27BCFD7" display="Login" widget="submit" attrs="" value="" key="submit"/>
  </form>
</response>