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="155FC554-772A-11F1-9A26-97EB25D43659" key="login" method="post">
    <field attrs="" key="username" display="Username" value="" name="username" id="uuid-155FF79A-772A-11F1-9A26-97EB25D43659" widget="text"/>
    <field name="password" id="uuid-15603548-772A-11F1-9A26-97EB25D43659" widget="password" key="password" display="Password" attrs=""/>
    <field widget="submit" id="uuid-156072E2-772A-11F1-9A26-97EB25D43659" name="submit" value="" display="Login" key="submit" attrs=""/>
  </form>
</response>