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 encoding="&#x2713;" method="post" uuid="9B531252-2684-11F1-A221-E2C57F2D798A" key="login" uri="">
    <field key="username" display="Username" id="uuid-9B5342C2-2684-11F1-A221-E2C57F2D798A" attrs="" value="" name="username" widget="text"/>
    <field attrs="" name="password" widget="password" key="password" display="Password" id="uuid-9B538C82-2684-11F1-A221-E2C57F2D798A"/>
    <field name="submit" attrs="" value="" widget="submit" display="Login" id="uuid-9B53D854-2684-11F1-A221-E2C57F2D798A" key="submit"/>
  </form>
</response>