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;" key="login" uuid="7A5788FA-C95C-11F1-B324-8CAF738CD348" uri="" method="post">
    <field attrs="" widget="text" display="Username" name="username" id="uuid-7A57BA78-C95C-11F1-B324-8CAF738CD348" value="" key="username"/>
    <field display="Password" widget="password" attrs="" name="password" id="uuid-7A57FF2E-C95C-11F1-B324-8CAF738CD348" key="password"/>
    <field key="submit" value="" name="submit" id="uuid-7A5846FA-C95C-11F1-B324-8CAF738CD348" attrs="" display="Login" widget="submit"/>
  </form>
</response>