If you're trying to add an area, a category, a substrate or a product and your production rates tab on your proposals starts loading and never stops so keeps on spinning, this is what you'll need to do
1. Click on "Production Rates"
2. Click on "Substrates"
3. Go to Every Area Substrate
4. Check Each Category and It´s Substrates
Each one of the categories added will need to have at least one substrate added for Production Rates to work
5. Check on Default Product If "No Product" Appears
Always have a product on this for Production Rates to work. If you have no product on any of your areas, it won't work on your proposals
