Wild Hearts won’t launch - EA app error (“error on our end”)

When launching Wild Hearts via Steam, I get:

"There was an error on our end."

I already tried:

- Clearing EA app cache

- Reinstalling EA app

- Restarting PC

- Re-logging Steam & EA

EA app opens fine, but the game fails to launch.

Platform: Steam (PC)

Is this a server/account issue?