Redownload your save data from the PS Plus cloud data. Download and overwrite the console data. Do not upload or you will lock yourself in a bad loop.
My last save was from last night 9:09pm and works fine. No loss in unlocks or anything. Progress is saved on the guns and unlocks too.
Warning, loadouts will be what they were at time of save.
So you get to go into the menu once, customize and thats it for now.
Once you start a game, going to customize will crash it.