MUT Challenges, H2H, and VS CPU all give server error.

I can enter Ultimate Team and use the menus, binder, lineup, and marketplace, but I cannot start any MUT gameplay mode. Challenges, Head-to-Head, and VS CPU all give “Our servers cannot process your request at this time. Please try again later.” I have reinstalled the game, verified Steam files, tried another network/hotspot, cleared cache/local files, reset and recreated my lineup, and tried a clean boot. EA Support has already logged a case for investigation. Is anyone else having this issue on PC/Steam?