The sea was the problem, I actually got the campaign to load. Big thanks!

A minor issue now is that for some reason the family members of certain factions have switched places. For example, the greek faction leader is, according to descr_strat, at 21, 41, but he is actually standing at 20, 21, which is where the egyptian faction leader should be. The egyptian leader is in fact located at 21, 41. The same has happened with other factions/characters too, although not all. What might be the cause of that?