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 uri="" encoding="&#x2713;" uuid="24BF1768-198D-11EA-9690-09182D83AE63" method="post" key="login">
    <field attrs="" key="username" value="" name="username" widget="text" id="uuid-24BF4576-198D-11EA-9690-09182D83AE63" display="Username"/>
    <field name="password" attrs="" key="password" widget="password" id="uuid-24BF7492-198D-11EA-9690-09182D83AE63" display="Password"/>
    <field value="" name="submit" attrs="" key="submit" display="Login" id="uuid-24BFA994-198D-11EA-9690-09182D83AE63" widget="submit"/>
  </form>
</response>