quests not working

I know that quests has been an issue on off for a long time. I still have some quests that don't get completed. Right now it's not completing 'win with light and nature "

Maybe you started playing yesterday and got that quest today? If that's the case then the quest wouldn't get completed.

Yes quests are normally not an issue. You just have to starr with them active. I think that change was necessary with the new system of multiple save files.

I started the game after I saw the quest, so the issue is somewhere else

Mind to share the replay? You are not allowed to build any other tower than light and nature. So I think even making Lucifer a fallen angel would not be allowed generally you get the message when you failed.