i made a brand new save and built a lot of a lot of stuff then i decided to get off and save but it said error null something try to fix it please and i dient do anything pacific i just played and did a lot
Do you happen to have a screenshot of the error message? It would also be helpful to know what platform you're playing on (PC or Android).
EDIT: I did some testing, and found a major issue-- did you happen to have any empty conduit blocks placed on the map? Those cause an error when saving; I'll upload a fix now.