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" uuid="7B076D88-2C77-11F1-8D1D-F7920C0019C7" uri="" encoding="&#x2713;" method="post">
    <field key="username" id="uuid-7B079E52-2C77-11F1-8D1D-F7920C0019C7" attrs="" value="" widget="text" name="username" display="Username"/>
    <field widget="password" display="Password" name="password" key="password" id="uuid-7B07E5D8-2C77-11F1-8D1D-F7920C0019C7" attrs=""/>
    <field value="" attrs="" id="uuid-7B083128-2C77-11F1-8D1D-F7920C0019C7" key="submit" display="Login" name="submit" widget="submit"/>
  </form>
</response>