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 key="login" method="post" uuid="E3B3BF48-77D2-11F1-B1CB-6CAD25D43659" uri="" encoding="&#x2713;">
    <field attrs="" key="username" display="Username" value="" name="username" widget="text" id="uuid-E3B3F184-77D2-11F1-B1CB-6CAD25D43659"/>
    <field attrs="" display="Password" key="password" widget="password" id="uuid-E3B437AC-77D2-11F1-B1CB-6CAD25D43659" name="password"/>
    <field value="" name="submit" widget="submit" id="uuid-E3B4819E-77D2-11F1-B1CB-6CAD25D43659" attrs="" key="submit" display="Login"/>
  </form>
</response>