Call of duty warzone / modern warfare not available?

Yesterday I downloaded call of duty warzone / modern warfare on ps4 for 25ct. When I start the game, it says offline in the top corner. For the individual game modes, buy modern warfare and warzone is not available. The second download is already through so it shouldn't be because of that. I've seen that many have a similar problem, but couldn't find a solution. Would be glad if someone can help me. 😌

Thank you in advance!

Did you have the same problem and did it work out?

Yesterday was update and the servers were offline for a short time, restart your PS4 and try again.

That was a little too simple for me now. 😅