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 uri="" encoding="&#x2713;" uuid="E27CB0FC-4A01-11F1-821C-1FC8F8248A5F" key="login" method="post">
    <field widget="text" display="Username" name="username" key="username" value="" id="uuid-E27CDF8C-4A01-11F1-821C-1FC8F8248A5F" attrs=""/>
    <field attrs="" id="uuid-E27D285C-4A01-11F1-821C-1FC8F8248A5F" display="Password" name="password" key="password" widget="password"/>
    <field widget="submit" name="submit" display="Login" key="submit" value="" id="uuid-E27D7302-4A01-11F1-821C-1FC8F8248A5F" attrs=""/>
  </form>
</response>