Same problem as many others, iPad Game Center isn’t working since the IOS 9 update and the two mods since haven’t fixed it. Tried everything I could find about it but no change. After the update the app would sometimes open in 2+ to 6+ minutes, but in last 5 days, can’t get it to open at all, just a blank white page. I have waited as long as 20 minutes and no change. In addition, games dependent on Game Center will not connect to GC. If I click on Game Center in settings, it just locks up my iPad until I eventually reset the iPad.