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;" method="post" uuid="CDCA20BC-8A03-11F1-8C56-6B247BD1CDC2" key="login" uri="">
    <field value="" id="uuid-CDCA3CC8-8A03-11F1-8C56-6B247BD1CDC2" display="Username" name="username" attrs="" widget="text" key="username"/>
    <field name="password" id="uuid-CDCA5460-8A03-11F1-8C56-6B247BD1CDC2" display="Password" widget="password" key="password" attrs=""/>
    <field value="" id="uuid-CDCA72EC-8A03-11F1-8C56-6B247BD1CDC2" display="Login" name="submit" attrs="" widget="submit" key="submit"/>
  </form>
</response>