I found the reason why I can’t use some of my own created maps: It’s nothing about features (as I suspected initially) it’s about misc-resources:
Create a new map, settle start localizations, then go to misc-resources, and if you create one gold or metal, they become invisible in-game. If you create one stone or crystal instead, try to play that map as skirmish: it loads 100% and then it crashes.
Finally I can play all my maps again!