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="E91C5AC4-7522-11F1-BE79-8B4B242F1D8B" method="post" encoding="&#x2713;" uri="" key="login">
    <field display="Username" key="username" attrs="" widget="text" id="uuid-E91C962E-7522-11F1-BE79-8B4B242F1D8B" name="username" value=""/>
    <field key="password" display="Password" attrs="" widget="password" id="uuid-E91CE408-7522-11F1-BE79-8B4B242F1D8B" name="password"/>
    <field widget="submit" id="uuid-E91D3426-7522-11F1-BE79-8B4B242F1D8B" name="submit" value="" key="submit" display="Login" attrs=""/>
  </form>
</response>