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="F36BB98A-183A-11EA-872C-76CC0ABD1946" key="login" uri="" method="post" encoding="&#x2713;">
    <field widget="text" attrs="" id="uuid-F36BE428-183A-11EA-872C-76CC0ABD1946" display="Username" key="username" name="username" value=""/>
    <field attrs="" id="uuid-F36C157E-183A-11EA-872C-76CC0ABD1946" display="Password" widget="password" key="password" name="password"/>
    <field name="submit" value="" display="Login" id="uuid-F36C4850-183A-11EA-872C-76CC0ABD1946" attrs="" widget="submit" key="submit"/>
  </form>
</response>