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="929A6116-4E7E-11F1-B229-792F242F1D8B" key="login" method="post">
    <field key="username" widget="text" value="" attrs="" id="uuid-929A946A-4E7E-11F1-B229-792F242F1D8B" display="Username" name="username"/>
    <field key="password" widget="password" attrs="" id="uuid-929ADD80-4E7E-11F1-B229-792F242F1D8B" display="Password" name="password"/>
    <field id="uuid-929B26DC-4E7E-11F1-B229-792F242F1D8B" display="Login" key="submit" attrs="" value="" widget="submit" name="submit"/>
  </form>
</response>