struggling with ACF relationship and a Advance query

Hello i’m struggling to get the advanced query setup for my loop grid. So i have 2 custom post types; Projects and Market Sectors. When my client creates a new project they select the appropriate/related market sector for that project via a ACF relationship field. I need to be able to show a loop grid of projects only related to the selected market sector. but i cant get it to work. everything im reading leads me back to this plugin as the solution, what am i missing? I’m using ‘dynamic related posts’ > ‘post is in current post custom field’ > ‘market_sector’ … ‘market_sector’ is the key for the Market Sector CPT but in that CPT is the list of different market sectors for the client to select when creating the new project. How do i only show project in that selected market sector? thank you