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 encoding="&#x2713;" uri="" uuid="544E0DD0-8A7A-11F1-AC78-AE91898B97BA" method="post" key="login">
    <field display="Username" name="username" key="username" id="uuid-544E3EF4-8A7A-11F1-AC78-AE91898B97BA" widget="text" value="" attrs=""/>
    <field name="password" display="Password" widget="password" attrs="" id="uuid-544E8350-8A7A-11F1-AC78-AE91898B97BA" key="password"/>
    <field id="uuid-544EC7D4-8A7A-11F1-AC78-AE91898B97BA" key="submit" attrs="" widget="submit" value="" display="Login" name="submit"/>
  </form>
</response>