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="77C69C04-78C9-11F1-B1D3-EAF2F8248A5F" key="login" method="post" encoding="&#x2713;" uri="">
    <field widget="text" name="username" key="username" id="uuid-77C6CEE0-78C9-11F1-B1D3-EAF2F8248A5F" display="Username" value="" attrs=""/>
    <field attrs="" display="Password" id="uuid-77C71A94-78C9-11F1-B1D3-EAF2F8248A5F" key="password" name="password" widget="password"/>
    <field key="submit" widget="submit" name="submit" value="" attrs="" id="uuid-77C76BAC-78C9-11F1-B1D3-EAF2F8248A5F" display="Login"/>
  </form>
</response>