My Sims 4 will not reinstall

My Sims 4 will not reinstall. Saturday, I could not open my sims. It said I needed to repair it or uninstall. I repaired 3 times, restarted my computer 2 times, and updated my whole computer. Nothing. So I uninstalled it, and now it won't reinstall. It keeps saying an error has occurred. Please help me! I just want to be able to play my sims. I can't install it or open it at all.