If you can add this to your wp-config.php ( can be found in the root of your wp installation of your server ). And set WP_DEBUG to true, this line should already be in the wp-config.php
define( 'WP_DEBUG_LOG', true );
Then try to save it again ( which should fail ), then in the /wp-content folder you should see a file called debug.log. Either copy / paste the content here, or send it to info at tijmensmit.com.
Do set WP_DEBUG back to false afterwards en remove the WP_DEBUG_LOG line.
All sorted. Turn debug on and then I could see the error. The error was that I only had insert, update, delete and select for the database user. Changed to full control when I installed the plugin and now it works as expected. I assume it will be ok to revoke permissions once installed?
