Hello. I never encounter this sort of error. It began when my vita shutdown randomly and when i boot up again, the wifi cannot be used. Im using quick access to enabled wifi and when i exit quick access and back it again, it will grey out. Then, im tried to enable through settings, when i ticked wifi, not even 1 access point available although it supposed to have several here. I tried to turn flight mode and it load several seconds showing error c2-16064-7 and shutting down. Quite frustrated, i began looking on setting if i made some mistakes and it turns out my mac address is blank. I looked on the internet and saw playstation community suggested to restore setting, restore system and update. Done all three but the error still persist. Is there any solution?