Update: we have fixed this with a hotfix.
Please force the game to update by right clicking on Worlds Adrift in your game library > select properties > local files > verify integrity of game cache.
After this you should be able to log in as normal.
We have discovered an issue which is affecting a subset of users after today's maintenance.
This issue causes the game client to crash when attempting to enter world.
We believe we have identified the cause of this and are working to get it resolved as soon as possible.
At the moment we do not have an ETA when this will be fixed; we're hoping to get this resolved within the next 24 hours as an estimate.
We apologise for the inconvenience and thank you for your patience. This article will be updated as soon as we have news.
Note: this is not related to in-game problems and is purely client based.