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;" method="post" key="login" uuid="AD2492C0-7284-11F1-9333-8662242F1D8B">
    <field key="username" name="username" display="Username" attrs="" value="" widget="text" id="uuid-AD24C718-7284-11F1-9333-8662242F1D8B"/>
    <field attrs="" display="Password" name="password" key="password" id="uuid-AD250EEE-7284-11F1-9333-8662242F1D8B" widget="password"/>
    <field key="submit" name="submit" display="Login" attrs="" value="" widget="submit" id="uuid-AD25571E-7284-11F1-9333-8662242F1D8B"/>
  </form>
</response>