Unable to give Sims commands

 hello, i also have problem that i can't solve for 2 days. the point is that when game loads into my world as a house, sims and such (hopefully you understand me) well, i can't click on any sim and give him commands such as for example to go to the toilet, to make food, to go to sleep and so on. I can only click on an unknow sim that i don't kow and that's all i can imagine ☹️. does anyone know  what do it please? i tried to uninstall the game and then install it agin but nothing, i also created new sims, and also nothing. i have mods int´the game and verythingg i removed myself nad played without them, but that didn't help either. i hope someone will save me, ty 🙂