Did you load an existing savegame? Those might not be compatible anymore due to some changes to states.

I ran an observe game to 1936 just now and it was perfectly stable, the mod itself also has nothing in it that could crash the game.

Same issue here.
More info: I started a wallachia --> romania game last night and ran it until 1867. Today, the save loads but then crashes immediately when unpaused.
There is nothing visibly wrong with the map or game while paused. The main menu has the (!) warning icon next to the save, saying "Missing Mods: -Historical (there's a square here which i think is normally used for unsupported text/ emoji characters) Light (Resources & Pop Growth)".
I.e. "Missing Mods: -Historical [] Light (Resources & Pop Growth)"
I have checked and confirmed I am loading it with the mod. I'm not sure why the name is different, but it is this mod. Any ideas?
Thanks.

Yeah I changed the name of the mod back to its original.
Unfortunately, due to the significant changes I made today, old savegames won't be compatible.
This is something that is unavoidable, which is why I'm doing it during a time before a DLC comes out when presumably not many people are playing. Usually I would just wait for the update itself, but I won't have much time to update the mod when it comes out, so I'm preparing things already.

Is it possible for you to download a previous version of the mod in the changelogs to keep playing? That's the only thing I can think of.
Alternatively, I could revert the updates until 1.7 comes out. However, I did fix bugs that affect gameplay, so those would be in again...

same issue here with the same caution message. I tried to open a savegame which i created earlier this week. where can i donwload an older version ?

Hm, it looks like the download button in the change notes is only for developers.
I'm just going to revert the updates for now. It sucks that bugs that I fixed will be left in, but it's only for 2 more weeks anyway. And once the update comes out, old savegames will be broken anyway, so it'll be safe to make the changes.

You should be able to play now. I reverted to yesterday's version where German states were fixed. If that still crashes games, then I'll have to revert to an even older version.

fun fact: I created the German Empire earlier that week and after reloading that save some parts of my country are not mine anymore: Frankfurt is part of svealand and the top corner of Silesia are part of russia now. the swiss own some parts of tirol and i own some privinces in west swiss

And most funny: the ottoman empire owns the west coast (only the coast not any provinces) of mexico and america :D

Very strange. All that I changed about states are some German provinces that were in the wrong states or not assigned to states at all. I guess that causes some weird reshuffling of states in savegames.

still same issue :(

I reverted to the old version with the broken German provinces now.

the issue with the broken provinces is fixed. But my Game is still crashing after unpause it after loading

Hm... then I have no idea what is causing it, because that's literally the same old version.

i think my save game is lost ... with a fresh start the game works without any trouble

but thanks for your effort <3

when i use your mod ,The population is getting smaller and smaller,maybe mortality rate is too high.
thanks