Over fed and burned.
Without a diary and no other info other than a random picture, this is the best an answer can be.
Every plant is an individual and what may be fine for one, may not be the best for another.
You need to watch and respond to plants individually and adjust fertilizers as required.......this plant has been burning for a while already, reducing the fertilizer earlier would have prevented it getting this advanced.
Next time, if you are unsure, ask questions as soon as symptoms appear, rather than letting it go on and hoping it will be ok.