I'm not exactly sure what caused it, but after circularizing an orbit around Kerbin my trajectory line has vanished.
Has anyone found a workaround to get it to display again? I've tried closing and reopening the game and it's still not appearing.
This happened to me after landing on the Mun and I think I've fixed it by editing the save file. Here's what I did:
I made a fresh quicksave with F5 and exited the game without saving, and then deleted all of the quicksaves and autosaves except for the most recent quicksave. You will want to open "quicksave_xx.json" where it matches the time you made the quicksave.
Find your vessel in the json file. It will be under AssemblyDefinition -> "assemblyName" and will have some number app