So what you are missing are the "Sleep day" and "Xmas episode". Sleep day can be triggered by clicking the duct tape in the garage. For Christmas bonus, well, it's tied to the Christmas, so either you use some cheats or then change your computers calendar settings to Christmas.
Do you have mods installed? If so, the mods will remove the bonus content code option from the menu.
1. What needs to be done? Well, as it says, to complete Sophie's quest to be able to continue Ellie's quest. Some quests are tied to each others and need to be progressed to be able to continue the others, so you can't basically skip any of the girls and some of them you need to do in specific order.
2. You need to learn the superpowers. According to their Discord going to bed and reseting the day will trigger that special event. However to trigger it, you need to have everything from the earlier episodes done before you can proceed to that.
So this is from their Discord: first check that you have completed everything else from previous episodes, so you only have Megan's, Zoe's and Amy's quests with "special event" in hints. Then reset the day by going to sleep and it will trigger the special event and after that open the quests.
