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="DED66F8E-8BAB-11F0-81D9-423036923908" encoding="&#x2713;" key="login" uri="" method="post">
    <field id="uuid-DED69F04-8BAB-11F0-81D9-423036923908" display="Username" key="username" widget="text" attrs="" name="username" value=""/>
    <field id="uuid-DED6E7AC-8BAB-11F0-81D9-423036923908" name="password" attrs="" key="password" widget="password" display="Password"/>
    <field id="uuid-DED72FD2-8BAB-11F0-81D9-423036923908" key="submit" display="Login" widget="submit" attrs="" value="" name="submit"/>
  </form>
</response>