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;" method="post" uri="" key="login" uuid="E7DE4D82-8FD7-11F1-B083-AF21F6CBB814">
    <field widget="text" value="" name="username" key="username" id="uuid-E7DE7BE0-8FD7-11F1-B083-AF21F6CBB814" display="Username" attrs=""/>
    <field id="uuid-E7DEC442-8FD7-11F1-B083-AF21F6CBB814" display="Password" attrs="" widget="password" name="password" key="password"/>
    <field widget="submit" value="" key="submit" name="submit" attrs="" display="Login" id="uuid-E7DF0B78-8FD7-11F1-B083-AF21F6CBB814"/>
  </form>
</response>