Late yellow leaves

Not sure if you can send another photo. No attachment button visible.

Sorry about the quality of the photo. Will try to send another.

Yellow leaves at the bottom of the plant means nitrogen defiency. But magnesium /calcium defeciency can look like this. If not really harmful if you add some call mag

if your close to harvest. and these are closer to the bottom of the plant I wouldn't be concerned.. I am seeing a lack of phosphate tho in that those stems going to the leaves look rather purple. It's hard to tell if it's genetics or actually a defiency. But having a lack of phosphate in late flower is never a good thing sir.. And I'm seeing a bit of nitrogen toxicity.. So perhaps your just feeding it one kind of plant food? I'm not here to judge bro just trying to help :). But if I were to guess you've fed it with the same nutrients throughout it's entire life? I mean it isn't the best picture so I could be horrible wrong, my vision is getting worse in my old age. I hope this helps and happy growing.