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="B7D1C074-7588-11F1-B416-F8D0F8248A5F" encoding="&#x2713;" key="login" method="post" uri="">
    <field attrs="" id="uuid-B7D1FA1C-7588-11F1-B416-F8D0F8248A5F" widget="text" key="username" name="username" value="" display="Username"/>
    <field name="password" key="password" widget="password" id="uuid-B7D24224-7588-11F1-B416-F8D0F8248A5F" attrs="" display="Password"/>
    <field value="" display="Login" attrs="" id="uuid-B7D28DEC-7588-11F1-B416-F8D0F8248A5F" widget="submit" key="submit" name="submit"/>
  </form>
</response>