Hello!
Regarding the savegame creation error - it seems you're storing in the game database something which doesn't support serialization. Alas, it's hard to tell what's exactly breaking the savegame creation but you can work back from your latest changes which caused the error.
Regarding the crates bug inside your modded "station interior" object - I think there is an interaction trigger conflict as the game client (made with Unity) is detecting the "station interior" object as the interactive object in front - so interaction with other objects is not possible.
Regarding the savegame creation error - it seems you're storing in the game database something which doesn't support serialization. Alas, it's hard to tell what's exactly breaking the savegame creation but you can work back from your latest changes which caused the error.
Regarding the crates bug inside your modded "station interior" object - I think there is an interaction trigger conflict as the game client (made with Unity) is detecting the "station interior" object as the interactive object in front - so interaction with other objects is not possible.