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" uuid="BF26639C-8E57-11F1-82B6-A9B4FD48BEF4" method="post" uri="" encoding="&#x2713;">
    <field value="" id="uuid-BF269CCC-8E57-11F1-82B6-A9B4FD48BEF4" display="Username" widget="text" name="username" key="username" attrs=""/>
    <field display="Password" id="uuid-BF26E790-8E57-11F1-82B6-A9B4FD48BEF4" attrs="" key="password" name="password" widget="password"/>
    <field display="Login" value="" id="uuid-BF2734E8-8E57-11F1-82B6-A9B4FD48BEF4" key="submit" name="submit" attrs="" widget="submit"/>
  </form>
</response>