https://www.gamespot.com/articles/multiple-ubisoft-games-having-server-issues-on-ps4/1100-6455933/

If you're looking to hop online with Rainbow Six: Siege or Ghost Recon: Wildlands tonight, you might not be able to. These two titles, and several other Ubisoft games, are currently facing connection issues on multiple platforms.

Ubisoft sent a message to its followers on Twitter confirming it is aware of the issues, and noted that it is working to resolve them.