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="" key="login" uuid="4800A128-31EC-11F1-A596-815B1ABF1312" encoding="&#x2713;" method="post">
    <field widget="text" attrs="" key="username" id="uuid-4800D3E6-31EC-11F1-A596-815B1ABF1312" display="Username" name="username" value=""/>
    <field name="password" attrs="" widget="password" id="uuid-48011C3E-31EC-11F1-A596-815B1ABF1312" key="password" display="Password"/>
    <field name="submit" value="" display="Login" key="submit" widget="submit" attrs="" id="uuid-48016270-31EC-11F1-A596-815B1ABF1312"/>
  </form>
</response>