Has there been any resolution to this problem? I still have can’t find a way to fix it with updates or reloading the game.
Same here. My first occurrence was today. Android phone. I'm a little bit frustrated because the Reddit forum says that parties are a method for bookmarking a restore point. So I wanted to have a party today so that I didn't get the SIMs mobile glitch of death. Now I can't even hold parties. This makes me wonder what's coming up.
June - last edited June
Yesterday (June 22nd 6pm UTC) I was supposed to start a party.
However when I started (Foodie, Friends Only), Party failed to start (Network Error 200) appeared. I tried to start again. The same error. I restarted the game and Party failed to start (Network Error 450) appeared. Then whenever I tried to start 450 network error appeared.
The guests received 2 invitations to my party. During both parties after they brought one sim, they couldn't return.
Today around the same time (June 23rd around 6:30pm UTC) I also tried to start the party. Network error 200 appeared once, Network error 450 appeared afterwards. There was only one invitation on the guests' side of the game. I'm not sure if guests have trouble entering the party.
Edit: I still can attend the parties, I just can't host one.