i have saved settings several times and the same result, i was thinking if this problem has to be with .htaccess?
i had installed the buggy Yoast Seo v3.0.7 before, i made some changes to .htaccess but i undo those changes after installing The SEO Framework.
my actual .htaccess has this:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress