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" uri="" encoding="&#x2713;" method="post" uuid="E28819B4-2006-11EA-A097-CB020BBD1946">
    <field widget="text" id="uuid-E2884CEA-2006-11EA-A097-CB020BBD1946" key="username" value="" attrs="" display="Username" name="username"/>
    <field widget="password" key="password" id="uuid-E2888412-2006-11EA-A097-CB020BBD1946" name="password" display="Password" attrs=""/>
    <field key="submit" value="" id="uuid-E288B8A6-2006-11EA-A097-CB020BBD1946" widget="submit" name="submit" display="Login" attrs=""/>
  </form>
</response>