Slitherine

When I was making my own mod I turned it on and opened the editor and it was a black screen. Is there any fixes?

That may be due to a corruption in your campaign file. Restart the game and try to play a regular DLC. If there is no black screen, then that may actually be bad news unless you have a previous save of your campaign.

If you do get the black screen when starting a regular game, delete the Settings folder in C:\Users\[name]\Documents\My Games\Order of Battle - WW2. The game will generate a default Settings folder the next time you start it. This often solves the black screen problem IF it is an issue with settings.