Saving and Crashing Issues

My game continuously will not save. I have even clicked the save and quit but it keeps crashing and not saving. I have had to go back through and rebuild the same structure about 10 times now. It's really starting to get annoying and I hope you can fix the saving issue. I really don't want to have to keep rebuilding over and over again. And I have been having a crashing issue where the game randomly and suddenly crashes and again won't save my progress. Sometimes when I press the save and quit it won't bug out and I can continue playing but once I get out of the game, it didn't save anything.