How do you ask a character on hogwarts mystery to play gobstones with you?

You can only at the game every 16hrs...Hope this helps anyone with the same problem I was having!

Source:

https://guides.gamepressure.com/harry_potter_the_hogwarts_mystery/guide.asp?ID=46471

Go to lower floor west, scroll all the way to the right and click on the courtyard icon. There will be an option to play gobstones. Click that and it takes you to the courtyard. Once in the courtyard you click on the icon that looks like two hands shaking and invite the friend of your choice! Hope this helps