In the multiplayer section of the weather menu , choose the middle square “all players" <- Did you try doing this? if so also turn multiplayer back on. It didnt work the 1st time I tried it either.
I did the ‘all’ and nothing happend so I went back and turned the ‘multiplayer function on’ and it worked.
And then being the glutton for punishment I am I turn off multiplayer and left all and it still worked.