When creating a table with four players, whenever the last player clicks on Ready there is an "Internal error" and we are unable to continue to play the game. This happened a few weeks ago and agin today (October 7 2022).
Until recently we had no such problem. For all practical purposes we cannot play the game.
See the attached screenshot where amryden tried to be ready.
I think you either need to add a Liaison manually, or have only one landscape slot selected.
What happens IMO is that the game tries to fill the 2 landscape slots, finds 2 from among the events,landmarks, projects and ways, and then sees no place to put the required Liaison. Since I don't know exactly how the landscape fill mechanism works, it might not even be enough to leave one landscape slot open. But selecting a Liaison explicitely should always work.