What’s wrong?

A couple of random blemishes.......wouldn't worry........no plant will ever have 100% perfect leaves, 100% of the time. The odd yellow spot and/or hole in the leaf is quite common, it is when multiple leaves are affected or if it starts spreading that you have to start worrying. Nonetheless, check the underside of the leaves for any insects, but I doubt you will find any, most likely the damage was caused by you when you were pegging the leaves down with those hard looking wire hoops. It certainly is not a deficiency, if anything, your plant is over fed and way too dark green. A plant started in a good sized pot in good quality soil should not need any extra feeding for at least 3-4 weeks. Don't fertilize just because you feel the need to "do something". Same goes for watering.........water to run off then do not water again until the top inch or so has dried out again. Never water to a schedule, like X amount every Y hours/days. Watch and observe, then react. Also, NEVER grow at 24/0, ALL cannabis plants, autos included, NEED "sleep" or a dark period ever day to complete their daily photosynthesis cycle. There are certain metabolic processes that can only occur during the night. Without this daily light/dark cycle a cannabis plant will have an incorrectly functioning metabolism and a plant with an incorrectly functioning metabolism will never grow to its full potential or be as healthy as it could be. It is an absolute myth that it is ok to grow any type of cannabis at 24/0. 18/6 is optimal.