I set off from my original island with 23 pieces of treasure exposed in my inventory, and a number of supplies and tools stashed away in small leather bags and backpacks.
After setting out in a bull boat, I found myself on another island, effectively starting over, but with all my inventory items still intact. However, I am unable to access any of the items in my leather containers, and am unable to deposit items into those, or newly-made small bags and backpacks.
I built several chests and have successfully deposited and withdrawn items from them, but any time I try to use a bag or backpack, I just get “an error has occurred.”
EDIT: I see now in another thread that you’re aware of the problem, and of course I should have tried saving and restarting