I had same issue, couldn't load game got 304,116 error code, I found that if you work your way back one at a time to a previous saved game you will find where it doesn't do that anymore... I only had to go back 4 saves but I save a LOT so it wasn't much rework... now I'm having issue with can't long rest even when going back to camp and I'm on the wall of traps all traps disarmed... in Under dark Grymforge ugh! got back to back "1" roll disarming and blew entire party up between flames!
