I have manage to save the settings for the home page.
When I save settings for post/page title it redirects to wp-admin/options.php and a page not found error.
I was also getting this with aioseo but their support was not very good so switched to this plugin with a similar problem. I deleted their pluging and started from scratch.
Permalinks are: /%category%/%postname%/
The site works fine but can't get any further than setting the homepage seo settings and saving them.