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 key="login" method="post" uri="" uuid="33AB2DD4-7E67-11F1-B5A1-DB9125D43659" encoding="&#x2713;">
    <field attrs="" display="Username" name="username" value="" key="username" widget="text" id="uuid-33AB5EE4-7E67-11F1-B5A1-DB9125D43659"/>
    <field display="Password" attrs="" name="password" key="password" widget="password" id="uuid-33ABA764-7E67-11F1-B5A1-DB9125D43659"/>
    <field value="" key="submit" name="submit" attrs="" display="Login" widget="submit" id="uuid-33ABF2B4-7E67-11F1-B5A1-DB9125D43659"/>
  </form>
</response>