If there is any compatibility issues let me know here. If possible please also post your mod list and error.log. Maybe I can fix some issues or post compatibility patches.

For the mod list, easiest way I know of would be to make scrennshots of your Paradox launcher with the mods enabled or post a collection if you're using one.

Your error.log is located in C:\Users\%YourUsername%\Documents\Paradox Interactive\Crusader Kings III\logs.
Copy everything from that file. To post it here, write (with no space before and after each bracket) [ code ], then paste it. Afterwards write [ /code ].
Alternatively, upload it somewhere.