Whole bunch of errors on WP website – media upload, edit slugs, edit screen not working [closed]

I had the same problem, but some extra and different plugins, after 2 days of disabling plugins one by one, checking theme files etc, etc, I decide to start from 0, Backup database, (all post, etc,~) and just re install. Not a beauty, but it will solve the problem faster than you searching for the needle on the haystack.

Possible quick solution –
Reinstall all including Plugins.