That's why I asked for clarification. So you edited career mod and now it crashes. Sorry to say, but there could be dozens of reasons for that, and it's impossible to know. This is how to troubleshoot, to find out which edits are causing the issue:
I have done that many times
1. Start again by reverting back to the unedited files.
2. Edit one thing only.
3. Test in-game to make sure it doesn't crash.
4. Edit one more thing.
5. Test in-game to make sure it doesn't crash.
6. Etc and so forth.