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 key="login" method="post" uri="" encoding="&#x2713;" uuid="C67EB8C0-88C5-11F1-BCF3-1E1A7BD1CDC2">
    <field display="Username" value="" name="username" attrs="" id="uuid-C67EEBB0-88C5-11F1-BCF3-1E1A7BD1CDC2" key="username" widget="text"/>
    <field name="password" attrs="" id="uuid-C67F33EA-88C5-11F1-BCF3-1E1A7BD1CDC2" widget="password" key="password" display="Password"/>
    <field key="submit" widget="submit" id="uuid-C67F7FE4-88C5-11F1-BCF3-1E1A7BD1CDC2" name="submit" attrs="" value="" display="Login"/>
  </form>
</response>