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="" uuid="B18C508E-CE12-11F1-9E6B-37C38D6E13F8" key="login" encoding="&#x2713;" method="post">
    <field key="username" widget="text" name="username" value="" id="uuid-B18C89C8-CE12-11F1-9E6B-37C38D6E13F8" attrs="" display="Username"/>
    <field key="password" widget="password" id="uuid-B18CD6BC-CE12-11F1-9E6B-37C38D6E13F8" name="password" attrs="" display="Password"/>
    <field display="Login" attrs="" value="" name="submit" id="uuid-B18D2298-CE12-11F1-9E6B-37C38D6E13F8" widget="submit" key="submit"/>
  </form>
</response>