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 encoding="&#x2713;" uri="" key="login" method="post" uuid="AF0E70BA-1AC8-11F1-A46B-D41F802D798A">
    <field widget="text" display="Username" name="username" id="uuid-AF0EAF1C-1AC8-11F1-A46B-D41F802D798A" attrs="" value="" key="username"/>
    <field key="password" name="password" attrs="" id="uuid-AF0EF77E-1AC8-11F1-A46B-D41F802D798A" display="Password" widget="password"/>
    <field key="submit" value="" attrs="" id="uuid-AF0F4544-1AC8-11F1-A46B-D41F802D798A" name="submit" widget="submit" display="Login"/>
  </form>
</response>