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="DC217BA2-C028-11EA-BBB6-D48947F95FFE" key="login" encoding="&#x2713;" uri="" method="post">
    <field attrs="" display="Username" widget="text" id="uuid-DC21A4EC-C028-11EA-BBB6-D48947F95FFE" name="username" value="" key="username"/>
    <field name="password" key="password" attrs="" widget="password" display="Password" id="uuid-DC21D89A-C028-11EA-BBB6-D48947F95FFE"/>
    <field id="uuid-DC2206E4-C028-11EA-BBB6-D48947F95FFE" widget="submit" display="Login" attrs="" key="submit" value="" name="submit"/>
  </form>
</response>