Hi there, I am new around here and still learning. I am working on a challenge project which is supposed ask user questions from times table. Everything was okay but suddenly Xcode stops working whenever i want to run the code. I changed literally nothing. Just took 10 minutes of break and came back and nothing works. I can't resume previews and can't run on simulator. I tried to clean build, relaunch xcode and even restart my computer but nothing solves my problem. I would be appreciated if someone can enlighten me.