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;" key="login" uuid="4203AAFE-CC60-11F1-9836-19FA8D6E13F8" method="post">
    <field attrs="" widget="text" name="username" id="uuid-4203E0B4-CC60-11F1-9836-19FA8D6E13F8" key="username" value="" display="Username"/>
    <field name="password" widget="password" attrs="" display="Password" key="password" id="uuid-420428C6-CC60-11F1-9836-19FA8D6E13F8"/>
    <field key="submit" id="uuid-420472CC-CC60-11F1-9836-19FA8D6E13F8" value="" display="Login" attrs="" name="submit" widget="submit"/>
  </form>
</response>