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="4558638C-7997-11F1-894C-C1BEF8248A5F" key="login" method="post" uri="" encoding="&#x2713;">
    <field id="uuid-455891A4-7997-11F1-894C-C1BEF8248A5F" name="username" attrs="" widget="text" value="" display="Username" key="username"/>
    <field id="uuid-4558D826-7997-11F1-894C-C1BEF8248A5F" name="password" attrs="" widget="password" display="Password" key="password"/>
    <field display="Login" key="submit" attrs="" id="uuid-45592010-7997-11F1-894C-C1BEF8248A5F" name="submit" widget="submit" value=""/>
  </form>
</response>