First Auto Run

It started last weeks with the leaves tips that has started to burn and the yellowing on the leaves , could be your feeding , your ph or a calcium deficiency

I feel like you may have watered too heavily the past few times and damaged the tiny little root hairs that allow the uptake of nutrients. This may cause the plant to show symptoms such as yours. The only thing to do is water lightly and let the plant regain it's strength. Water and microbes is my suggestion.

I'm not sure it is a deficiency. It could be pH related, since you post no information regarding pH or feeding strength. It could be just the plant coming to the end of its life cycle and dying. at this point I would just let it be since you are almost to harvest time.