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" uuid="994B2DDC-183A-11EA-8347-FCDC2C83AE63" method="post" uri="" encoding="&#x2713;">
    <field widget="text" display="Username" id="uuid-994B5D7A-183A-11EA-8347-FCDC2C83AE63" name="username" value="" attrs="" key="username"/>
    <field id="uuid-994B8958-183A-11EA-85B3-FCDC2C83AE63" widget="password" display="Password" name="password" attrs="" key="password"/>
    <field id="uuid-994BB78E-183A-11EA-9A24-FCDC2C83AE63" widget="submit" display="Login" attrs="" key="submit" value="" name="submit"/>
  </form>
</response>