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 encoding="&#x2713;" uri="" uuid="CDF5BAD8-4E6C-11F1-AC76-C0F2F8248A5F" method="post" key="login">
    <field key="username" name="username" widget="text" id="uuid-CDF5EAD0-4E6C-11F1-AC76-C0F2F8248A5F" value="" display="Username" attrs=""/>
    <field widget="password" id="uuid-CDF6331E-4E6C-11F1-AC76-C0F2F8248A5F" name="password" key="password" attrs="" display="Password"/>
    <field attrs="" display="Login" id="uuid-CDF67CAC-4E6C-11F1-AC76-C0F2F8248A5F" widget="submit" value="" name="submit" key="submit"/>
  </form>
</response>