AI Behavior not working anymore after editor crashed

My AI worked fine. It followed a path and started to chase the player if heared or sighted. Unfortunately, my editor crashed today and now the AI is not working anymore. It’s not chasing the player anymore, nor doing anything at all. I even deleted the NPC_Char_Blueprint which was placed in the world and re-added it, exactly as the path points to follow. But still nothing. I even closed the editor again and opened it again but it is just not working. By the way, one of my other blueprint characters which I placed in the world long time ago disappeared as well after the crash. It’s pretty annoying because now I have to spend hours for fixing this somehow even if everyhting is set absolutely perfectly. Just not working because the editor crash confused the program or what so ever.

Any solutions to that…?