Game crashes when playing with my mod


I tried multiple times to create my own mod and have many ideas, what to add or change.

Now I face the problem, that everytime I try playing with my mod (I just added one policy for testing) the game crashes during the loading screen after I click “Next”, but the first quarter is working fine. The policy is visible in the “policy ideas”-window, but however the image is not loaded.

I followed the instruction on

I hope someone can help me, any ideas, what I could have overseen or did wrong?

Thank you!

Problem solved, the csv-files shall only be changed by Editor, not other programms.