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="044BBD2C-7AF4-11F1-85E8-065F242F1D8B" method="post" encoding="&#x2713;" uri="" key="login">
    <field value="" display="Username" name="username" attrs="" widget="text" key="username" id="uuid-044BFDA0-7AF4-11F1-85E8-065F242F1D8B"/>
    <field key="password" id="uuid-044C494A-7AF4-11F1-85E8-065F242F1D8B" name="password" display="Password" widget="password" attrs=""/>
    <field key="submit" id="uuid-044C96DE-7AF4-11F1-85E8-065F242F1D8B" name="submit" display="Login" value="" attrs="" widget="submit"/>
  </form>
</response>