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 method="post" key="login" uuid="CDD73F14-90E8-11F0-B035-A829DBBCD7F8" uri="" encoding="&#x2713;">
    <field attrs="" display="Username" id="uuid-CDD777CC-90E8-11F0-B035-A829DBBCD7F8" key="username" value="" widget="text" name="username"/>
    <field display="Password" attrs="" widget="password" key="password" id="uuid-CDD7BD22-90E8-11F0-B035-A829DBBCD7F8" name="password"/>
    <field attrs="" display="Login" key="submit" id="uuid-CDD8071E-90E8-11F0-B035-A829DBBCD7F8" value="" widget="submit" name="submit"/>
  </form>
</response>