I’ve turned on the modules and have Advanced Custom Fields Pro installed. In the backend all my posts have vanished. The Jargon Buster does work as I’ve created a new post to test it. I’m hoping that all my previous posts are in the system somewhere otherwise, I’ll have to start over. 🙁
Don’t worry, your posts are still in the database.
I’ve added a plugin on github to correct missing vacancies and jargonbusters. Install and activate the GovIntranet 4 upgrade fix plugin (not the original upgrade plugin!) and run the fix from the Tools menu.