how to set approval of admin for wordpress posts submitted by the user?

There’s a BuddyPress Moderation Plugin which does this. As of time of writing this plugin is old and looking unmaintained, however I think it’s active on a site I’m admin and will work for what you need.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)