Modded PSP handhelds can now connect to WPA2 encrypted Wi-Fi networks, thanks to a custom firmware update. PSP’s multiplayer and online functionality have long been dead since the 20-year-old console ...
Try rebooting your PSP by sliding and holding the power button on the machine for about 5 seconds. There is still some instability in the 2.0 firmware and the PSP may need to be reset.