simcity apparently already playing

just downloaded simcity and it wont play. i checked that my laptop met all the requirements and it does. i click to run the game and it says im not connected to the internet, which i am, and asks me if i want to continue single-player or quit. clicking single player does nothing, it returns to my desktop and if i click to run the game again, it says the games already running. ive tried rebooting my laptop but still the same issue. whats going on? why wont it run? can anyone help please? 🙏