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" encoding="&#x2713;" uri="" key="login" uuid="28E83230-7A48-11F0-82F7-74604E8DD072">
    <field widget="text" display="Username" attrs="" value="" key="username" id="uuid-28E86714-7A48-11F0-82F7-74604E8DD072" name="username"/>
    <field name="password" id="uuid-28E8AFE4-7A48-11F0-82F7-74604E8DD072" key="password" display="Password" attrs="" widget="password"/>
    <field value="" widget="submit" attrs="" display="Login" name="submit" key="submit" id="uuid-28E8FA80-7A48-11F0-82F7-74604E8DD072"/>
  </form>
</response>