Looks like light burn to me but you have a stalk much lower with the same symptom so its prob nutr burn. Maybe lower your ppm on the nutr. And see if it goes away.
Hard to tell from the picture. Could also be light burn/heat stress. What are your temps/light distance/light info. Generally speaking its nute burn when symptoms start at the bottom and up, and light burn from the top down.
I'm going to agree with @VRTLYCHALNGD. The damage seems to be mostly at the top of the plant and the way some of those leaves are twisting hint at light or heat stress.
But nothing too bad, you should be able to get her back on track and get a good yield.
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Looks like light burn to me but you have a stalk much lower with the same symptom so its prob nutr burn. Maybe lower your ppm on the nutr. And see if it goes away.
They look fine to me, don't over think it. Just nip those leaves off and start a plain water schedule for two days and go back to feeding again.
Hard to tell from the picture. Could also be light burn/heat stress. What are your temps/light distance/light info. Generally speaking its nute burn when symptoms start at the bottom and up, and light burn from the top down.
I can't see pic, just file download that don't open. Maybe my system, I don't know.
Potential magnesium deficiency. You could use cal-mag or 1 tablespoon of Epsom salt/gallon of water