New quests don't show up on map, which can only be resolved by nukeing and manually completing previous ones. Before that, "unable to concatenate a 'nil' value" error appeared a few times. Also, "?" icons on map sometimes don't disappear after quest is completed and remain until game reset.

If you are using the v3.7 branch, see my answer on issue #446. Otherwise I would need to know the exact error message.

Assumed solved. If you continue having problems, please re-open this issue or create a new one.