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="5E9D7FB0-16B1-11F1-B4E9-9F351ABF1312" uri="" key="login" method="post" encoding="&#x2713;">
    <field value="" id="uuid-5E9DB2B4-16B1-11F1-B4E9-9F351ABF1312" attrs="" key="username" widget="text" display="Username" name="username"/>
    <field widget="password" display="Password" name="password" key="password" attrs="" id="uuid-5E9DFCB0-16B1-11F1-B4E9-9F351ABF1312"/>
    <field display="Login" name="submit" widget="submit" key="submit" attrs="" value="" id="uuid-5E9E48E6-16B1-11F1-B4E9-9F351ABF1312"/>
  </form>
</response>