Also note that just rebooting should bring the data back, but you still need to fix the underlying issue or it will likely happen again.
Errors on parity drive are logged like a disk problem, though SMART looks OK and it's using a Marvell controller, still should run an extended test, but the main problem was the onboard SATA controller, which is unfortunately quite common with some Ryzen boards, looks for a BIOS update, if that doesn't help and other than using a different board best bet is to use an add-on controller (non Marvell).