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 method="post" uuid="F612B024-7A8D-11F0-86AC-D06E4E8DD072" encoding="&#x2713;" uri="" key="login">
    <field widget="text" display="Username" attrs="" value="" key="username" id="uuid-F612E6DE-7A8D-11F0-86AC-D06E4E8DD072" name="username"/>
    <field attrs="" display="Password" widget="password" name="password" id="uuid-F6132BB2-7A8D-11F0-86AC-D06E4E8DD072" key="password"/>
    <field name="submit" id="uuid-F613778E-7A8D-11F0-86AC-D06E4E8DD072" key="submit" value="" attrs="" display="Login" widget="submit"/>
  </form>
</response>