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" uuid="632B2702-90F7-11F0-AEB4-5D053049FC8C" method="post" uri="" encoding="&#x2713;">
    <field key="username" display="Username" id="uuid-632B5A56-90F7-11F0-AEB4-5D053049FC8C" name="username" attrs="" value="" widget="text"/>
    <field widget="password" attrs="" name="password" id="uuid-632B9FC0-90F7-11F0-AEB4-5D053049FC8C" display="Password" key="password"/>
    <field widget="submit" value="" attrs="" name="submit" id="uuid-632BE71E-90F7-11F0-AEB4-5D053049FC8C" display="Login" key="submit"/>
  </form>
</response>