Bro, you're not the only one dealing with this today! You've had problems for a while, you're not the only one who reached out now that it's such a NIGHTMARE!
Nitrogen overdose, already at the stage of saturation, the tissues are trying to die off, I see that the leaves at the bottom are glossy and very green! This problem has been with you for a long time, my friend!
At first, your plant was very green and beautiful, but everything went sideways with flowering! The stems of the leaves are red - phosphorus deficiency, it's blocked by nitrogen overdose! This is a disaster! It's one thing after another! You need a flush technique and definitely add fresh soil on top if the flush is strong! 👆 Check your runoff ppm during the flush!
Reduce the Gro supplement by 4 times! Increase the Bloom supplement by 3 times! The ratio should be 1:4 Gro:Bloom! Give 50% of the recommended fertilizer dose from the manufacturer!!! ✊😇
Good luck, my friend! I hope you save it... but it's a tough one 👆