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 method="post" uuid="E8E15A1C-73DB-11F0-B047-6D6662E0087B" encoding="&#x2713;" uri="" key="login">
    <field name="username" widget="text" key="username" attrs="" value="" id="uuid-E8E18CB2-73DB-11F0-B047-6D6662E0087B" display="Username"/>
    <field name="password" widget="password" id="uuid-E8E1D4CE-73DB-11F0-B047-6D6662E0087B" display="Password" key="password" attrs=""/>
    <field widget="submit" name="submit" attrs="" key="submit" display="Login" value="" id="uuid-E8E21F38-73DB-11F0-B047-6D6662E0087B"/>
  </form>
</response>