Re: ID_PC_CORRUPT_SAVE_BODY ERROR
What solutions have you tried?
The error likely relates to your Documents\Battlefield 2042\settings\PROFSAVE_profile file. Removing the file entirely will allow the game to rebuild the file, at cost of wiping any custom settings or keybinds you've set.
Also a chance that it has affected your PROFSAVE file. Removing this will cause the game to reload the intro mission (3-flag Hourglass CQ, limited kits and vehicles) and some other settings that aren't kept in PROFSAVE_profile.
Your progression is kept separately from both files, so you'll have all of your unlocks still unlocked.