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" uri="" encoding="&#x2713;" uuid="1C6CAA54-6AE3-11F1-98A6-1ED425D43659" method="post">
    <field widget="text" key="username" name="username" display="Username" attrs="" id="uuid-1C6CDDD0-6AE3-11F1-98A6-1ED425D43659" value=""/>
    <field id="uuid-1C6D268C-6AE3-11F1-98A6-1ED425D43659" widget="password" key="password" attrs="" display="Password" name="password"/>
    <field display="Login" attrs="" name="submit" key="submit" widget="submit" value="" id="uuid-1C6D7146-6AE3-11F1-98A6-1ED425D43659"/>
  </form>
</response>