Pretty much what the topic says. Tried configuring place on roblox, and there is no option. As you can see the option to change the game max players is currently grayed out. The game is currently public for the purpose of debugging this issue.
You can click the three dots which should bring up a drop down then press configure place then access and select the drop down for max players and anything else.
You have to edit that on the website on your place settings.
As @TheCarbyneUniverse said, go to your game > Configure Place > Access > Player Amount > Save.
Oh I see, I was going to start place settings I was going to just regular game settings. Thanks