This issue should be resolved with patch 0.4.0. If you continue to experience this issue, please reach out to us through our support site to let us know.
Some players are reporting Grounded crashing when trying to load into the game.
PC, Xbox One
Players on Steam report that they can get the game to work on the second or third attempt, so keep trying to see if you can load into the game. We are currently looking into this issue and are working on it to get everyone into the game playing.