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 uuid="5ECEE494-673B-11F1-B66B-AB6E1BBD9EFC" key="login" uri="" encoding="&#x2713;" method="post">
    <field widget="text" id="uuid-5ECF17D4-673B-11F1-B66B-AB6E1BBD9EFC" key="username" name="username" display="Username" attrs="" value=""/>
    <field widget="password" display="Password" attrs="" name="password" key="password" id="uuid-5ECF6176-673B-11F1-B66B-AB6E1BBD9EFC"/>
    <field widget="submit" name="submit" id="uuid-5ECFA7E4-673B-11F1-B66B-AB6E1BBD9EFC" key="submit" value="" attrs="" display="Login"/>
  </form>
</response>