It also crashes when trying to hire mercs in province window.

Same here, crashes when opening macro-builder (B) and when hitting hire mercs button in a province. Started a campaign as Ovdal Lodhum and tried to hire some mercs to fight the rebels...

its actually preventing me from playing the mod at all because i use the production interface all the time

I just discovered this as well opening the macro builder and opening up the detailed country modifiers interface

Just found out the fix, this is straight from the mod discord:

Thorfindel — 09/28/2022
Steam and 1.34 don't work. Steam is 1.33.3

Meat Toboggan OP — 09/28/2022
Ok, Thank you

Thorfindel — 09/28/2022
I made sure to verify if it crashes on bitbucket on 1.34, but this isn't the case
So for steam stick to 1.33.3 for now.
In November we update steam

引用自 Clout：

Just found out the fix, this is straight from the mod discord:

Thorfindel — 09/28/2022
Steam and 1.34 don't work. Steam is 1.33.3

Meat Toboggan OP — 09/28/2022
Ok, Thank you

Thorfindel — 09/28/2022
I made sure to verify if it crashes on bitbucket on 1.34, but this isn't the case
So for steam stick to 1.33.3 for now.
In November we update steam

So go to betas when you right click on eu4 in your library and switch it to the old version 1.33 and it should work. Have fun!