@iamksw7 a lot of mods are updated but there are some where the creator just abandons them and no longer work as the script or data is outdated and no longer read right. Some also abandon an old version of the mod and make an entirely new mod with new features and it's easier to code like LeFix Fuel mod for example. You can download mods and try them out yourself which outdated ones crash the game and which ones are updated to work for every game version.