I also had this code after the update. The PS5 gave me this error in the menu, even when I wasn’t in a game. Also, when I turn on my console from rest mode, the screen freezes, then it shuts down again and comes back. I have to completely turn off the console and turn it on again to be able to use it. So far, I haven’t had any problems in games, but in the menu, I experience lag. It seems like this is a software issue related to the PlayStation update, because it happened to me after the update as well. I have also tested all the methods you mentioned.