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="7B029D54-9FDB-11F0-83F1-F24236923908" method="post" uri="" encoding="&#x2713;">
    <field id="uuid-7B02D3B4-9FDB-11F0-83F1-F24236923908" name="username" value="" attrs="" widget="text" display="Username" key="username"/>
    <field attrs="" name="password" id="uuid-7B031C52-9FDB-11F0-83F1-F24236923908" widget="password" display="Password" key="password"/>
    <field widget="submit" name="submit" id="uuid-7B03645A-9FDB-11F0-83F1-F24236923908" attrs="" value="" key="submit" display="Login"/>
  </form>
</response>