[RL] Dynasties disappeared and nobles lost their status

Same for me, all the dynasties and aristocracy are suddenly gone, even the pre-made ones. Can't say exactly when it happened, but looks like it was today during the gameplay. What's interesting: one of my family members got married today and there was a window asking if their new husband will join the dynasty. I also opened dynasties window several times yesterday and today and they all were there, but if I load a save from 3 days ago the dynasties are also not there. But they do exist in autosave from 07.08 (before I turned autosave off).
I've noticed it when today the head of my dynasty had a wish to choose a heir, I was surprised because she already had a heir and when I opened the dynasty window there wasn't any dynasty. I haven't change any lifespan settings but I did changes some neighbourhood rules, did a makeover of some families and deleted some NPC families right before I noticed that the dynasties were gone.