This is bud rot growmie, this a serious problem that needs to be taken care of immediately. See the areas on the colas where everything (buds, pistils, and/or leaves) are darkening, becoming discolored, and/or drying up, unlike the rest of the plant. It looks like your in the beginning stage of it. Immediately remove all rotted parts and nearby areas. The only way to stop the spread is to remove all signs of mold from the plant, then move plants to a cool, dry area with a nice breeze. Be extremely careful not to let any rot touch any part of the rest of your plant After doing this.You can either…harvest the cannabis plant now, which I wouldn't do yet she's not ready yet, or let it continue to ripen, but only if you fix the environment Hopefully, I answered your question and remember Happy Growing and Free your mind one puff at a time.