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="" encoding="&#x2713;" method="post" key="login" uuid="69CF3426-7694-11F1-9B11-7723F9248A5F">
    <field attrs="" value="" display="Username" id="uuid-69CF6DBA-7694-11F1-9B11-7723F9248A5F" key="username" widget="text" name="username"/>
    <field name="password" widget="password" key="password" display="Password" id="uuid-69CFB4F0-7694-11F1-9B11-7723F9248A5F" attrs=""/>
    <field widget="submit" name="submit" key="submit" id="uuid-69CFFE6A-7694-11F1-9B11-7723F9248A5F" display="Login" attrs="" value=""/>
  </form>
</response>