Well that was my first thought and I've tried completely clearing the entire game folder and redownloading, after that still didn't work I tried clearing the scenarios and training but the bug still persisted. I then thought maybe the game was having issues generating a correct save file, so I made a save on vanilla ksp then installed kopernicus and yet still it refuses to load. It's a mystery to me.
just to double check this IS what my gamedata should look like with kopernicus and OPM installed isn't it?