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 uri="" uuid="5E40E05E-2596-11F1-A299-B91B2697109C" method="post" encoding="&#x2713;" key="login">
    <field display="Username" widget="text" name="username" id="uuid-5E4111C8-2596-11F1-A299-B91B2697109C" attrs="" value="" key="username"/>
    <field widget="password" display="Password" name="password" attrs="" id="uuid-5E415534-2596-11F1-A299-B91B2697109C" key="password"/>
    <field value="" key="submit" attrs="" id="uuid-5E419C1A-2596-11F1-A299-B91B2697109C" name="submit" widget="submit" display="Login"/>
  </form>
</response>